The Hole - IdleOn

Aleph

October 8, 2025

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The Hole is an area in IdleOn where you can discover Caverns all containing unique mechanics that give various bonuses to your Idleon characters.

• Villagers
• Explorer
• Engineer
• Bonuses
• Measure
• Studies

The Hole is located in World 5 Smolderin' Plateau at the map The Hole.

This guide looks at all the Villagers you can obtain at The Hole.

Check out our The Caverns guide for all the different Caverns you can find and how they work.

Villagers

Villagers are discovered in The Hole through the various Caverns that are available. Each Villager has a specific function that will expand as they level up.

When you find a Villager, click on them and they will then return to your Campsite unlocking their feature.

You can increase the speed at which a Villager levels up using Opals. Opals are special items found in The Hole, which you can give to any of your Villagers to increase the EXP they earn over time.

You can reset your spent Opals by visiting The Lamp in Cavern 7 and reinvest them.

When a Villager levels up, it will expand the feature. The first Villager you find is Polonai, who is used to explore the Hole and discover Caverns. Once a Cavern has been discovered, you can explore it by clicking on The Hole at the campsite.

Below you can find all the Villagers in the game:

Area	Villager	Description	Found
Explorer	Polonai	Polonai gains EXP over time based on the amount of Opals he has been given. Each Level Up will discover a new Cavern for you to explore.	Campsite (default)
Engineer	Kaipu	Kaipu will discover new schematics you can learn by spending resources on. These schematics give various bonuses.	Motherlode (Cavern II)
Bonuses	Cosmo	Cosmo will give you new various bonuses to learn per Level he gains.	The Bell (Cavern V)
Measure	Minau	Spend resources you have earned from The Hole on various upgrades.	The Lamp (Cavern VII)
Studies	Bolaia	Bolaia will study various bonuses for each Cavern you have discovered	The Evertree (Cavern XII)

Explorer

The following Caverns are available to find through Explorer:

Cavern	Notes	Level
The Well	Fill your bucket up to discover different rocks that can be spent on various upgrades.	1
Motherlode	Mine a giant rock to find Opals	2
The Den	Fight waves of monsters that get stronger and stronger to find Opals	3
Bravery Monument	A mini-game that gets tougher and tougher, giving various account-wide bonuses that stack each time you play.	4
The Bell	Ring the bell to gain Opals, various The Hole upgrades and improvements.	5
The Harp	Play the harp for various resources you can spend on various upgrades	6
The Lamp	Learn various upgrades with Wishes that can be upgraded with more Wishes.	7
The Hive	A giant hive you can perform Catching on to find Opals	8
Grotto	Fight monsters that spawn to find Opals	9
Justice Monument	A mini-game that gets tougher and tougher, giving various account-wide bonuses that stack each time you play.	10
The Jars	Earn resources you can spend on various upgrades	11
Evertree	A giant tree you can chop for Opals	12
Wisdom Monument		13
The Gambit		14
The Temple		15

Engineer

In the Engineer tab, you can learn schematics that offer various bonuses for The Hole.

Each time you Level up Kaipu you'll learn a new set of Schematics. Each Schematic requires a particular resource to learn.

Name	Bonus	Cost	Level
Opal Dividends (0)	Each opal invested in a villager now gives them 125 EXP/hr, instead of 100 EXP/hr @ Also worry not, you can reset your opals later at Cavern 7	x6	1
Better Buckets (1)	Increases the base fill rate of all Well Buckets from 10/hr to 15/hr. IMPORTANT:You can click on the buckets for more info!	x8	1
Loadin' some 'Lode (58)	Gives +5 Bucket Fill Rate per Power of 10 Motherlode Ore mined. You have mined # so far! @ Total Bonus: +{/hr Bucket Fill Rate	x12	1
Hiring the Hounds from Beyond (59)	Gives +10 B.F.R. per 100 hounds defeated in best runs of each class. 尬 Beginner:!, Warrior:#, Archer:$, Mage:% @ Total Bonus: +{/hr Bucket Fill Rate	x30	1
Cavern 'Porting (2)	All teleports to this map are free! Also, did you know you can double-click a map instead of pressing the Teleport button?	x60	2
Bar Expand-o-rama (12)	Adds the 'Expand Full Bars' toggle to the Well! Let me explain... when a bar is full of sediment, you lose half of the sediment, but permanently increase the max by 1.50x!	x100	2
2nd Bucket! (3)	Adds another bucket at the Well! You'll need to expand your Gravel bar to hold the 130 needed to create this!	x130	2
DNA Rock Tumbler (52)	Gives you a +60% chance to get an additional Grey Gene when trashing a pet for every Power of 10 Gravel you have. @ Total Bonus: +{% Chance for extra Gene	x461	3
Motherlode ~ Bucket Synergy (15)	Gives all your buckets 1.10x fill rate per Motherlode Layer you've destroyed! @ Total Bonus: {x	x180	3
Green Amplifier (16)	Adds a new Amplifier stone to interact with at the Dawg Den!	x250	3
Expander Extravaganza (14)	Gives all your buckets +20% Fill Rate per bar expansion across all sediment types! This includes Uber expansions later! @ Total Bonus: +{%	x350	4
Even Better Buckets (26)	Increases the base fill rate of all Well Buckets from 15/hr to 20/hr. Try changing your bucket to remove the rocks, once you remove that layer you can collect gold dust!	x2K	4
The Story Changes Over Time... (24)	Bravery Swords get +1 minimum DMG and +10 maximum DMG per 6 HR of AFK time at the Bravery Monument!	x600	4
3rd Bucket! (4)	Adds another bucket at the Well! Remember, click a bucket to change what sediment it collects! That's how you get this gold resource!	x850	5
True Golden Edge (57)	Gives all your players +20% Damage for every Power of 10 Golddust you have. @ Total Bonus: +{% Damage	x5.4K	5
Double Dinger Ringer (42)	Ringing the Bell now has a +30% chance of giving +2 LV to a bonus, instead of just +1 LV	x7K	5
Pink Amplifier (17)	Adds a new Amplifier stone to interact with at the Dawg Den!	x3.3K	5
Heavy Redstone Seasoning (56)	Gives you a multiplicative 1.30x Cooking Speed bonus for every Power of 10 Redstone you have. @ Total Bonus: {x Cooking Speed	x14.6K	6
Motherlode Trickledown (49)	+15% All Skill Efficiency, and +10% All Skill EXP gain per Motherlode Layer you've destroyed!	x18.7K	6
Loaded Harp (32)	Adds +1 more string to the Harp, ready to be strummed until the end of (the) time (signature)!	x183	6
Eee String (27)	Permanently unlocks a new String Type for the Harp! You can level it up by plucking it, getting +1 EXP per 100% Harp Power!	x260	7
UBER Bar Expand-o-rama-hala (13)	Allow for UBER Full Bar Expansion, which means you can expand Well Bars beyond the previous limit of 14 times.	x28K	7
4th Bucket! (5)	Adds yet another bucket at the Well!	x82.3K	7
Yellow Amplifier (18)	Adds a new Amplifier stone to interact with at the Dawg Den!	x105.3K	8
Tune of Artifaction (55)	Gives you +10% Artifact Find Chance for every Power of 10 Natural Notes you have. @ Total Bonus: +{% Artifact Find Chance	x1.4K	8
Improvement Stackin' (45)	For every 25 LVs across all Improvement Methods upgrades at the Bell, all your Improvement Method bonuses are 1.10x higher! @ Total bonus: }x	x2.5K	8
RNG Oxidizing Layer (43)	When you Clean the Bell and FAIL to get a new Improvement Method, the success chance for next time goes up by 1.25x. This happens every fail, and resets when you finally succeed!	x282.7K	9
Stringy Effect (39)	Strings give +15% more. @ More what, you ask? More everything! They give more String EXP, more notes, higher chance for opal... so yea, MORE!	x463.2K	9
Packed Harp (33)	Adds +1 more string to the Harp, you'll find it right next to all your other strings!	x9K	9
Domino Effect (37)	Strings give +20% more per string plucked during a strum... let me explain. Imagine you have 5 strings, this would mean the final string you pluck would be worth DOUBLE!	x758.9K	10
Fractalfly ~ Harp Synergy (41)	Boosts your Harp Note production by 1.10x per Undying Hive Layer you've destroyed! @ Total Bonus: {x	x23.2K	10
Five Nights at Bucket (6)	Adds one more bucket at the Well! Five buckets!!! WOW! That's worth writing home about!	x1.6M	10
Eff String (28)	Permanently unlocks a new String Type for the Harp! You can level it up by plucking it, getting +1 EXP per 100% Harp Power!	x46.7K	10
Cyan Amplifier (19)	Adds a new Amplifier stone to interact with at the Dawg Den!	x3.3M	11
Triple Tap Tinkle (60)	Ringing the Bell now has another +30% chance of giving +2 LV to a bonus instead of just +1 LV. Also, there's a new +20% chance of giving +3 LV instead of +2 or +1!	x4.3M	11
First Try, I swear! (25)	If you throw the LAST bravery sword first, and it kills the monster, you get a +10% Sword Max DMG bonus for the rest of the story. If it doesn't kill, this bonus resets back to 0%	x5.5M	11
Amplifier Stackin' (23)	You now get an additional +0.50x Multiplier at the Dawg Den for every 10 total charge across all amplifiers!	x9M	12
Geez String (29)	Permanently unlocks a new String Type for the Harp! You can level it up just like any other string, getting +1 EXP per 100% Harp Power!	x441.4K	12
Final Ballad of the Snail (53)	Gives you a 1.04x higher success chance when leveling up Snail for every Power of 10 Trebel Notes you have. @ Total Bonus: {x Snail success chance	x802.1K	12
Fractalfly Trickledown (50)	+15% All Skill Efficiency, and +10% All Skill EXP gain per Undying Hive Layer you've destroyed!	x1.1M	13
Hefty Harp (34)	Adds +1 more string to the Harp, it even makes sound when strummed! The other ones do too, but like, this one does too! Just incase you were worried it wouldn't.	x1.6M	13
Reroll Keeper (40)	Each unused reroll you have in a Bravery Story gives +10% Sword Max DMG. So don't be all loosey goosey with those rerolls!	x50.4M	13
6th Bucket! (7)	Adds another bucket at the Well! I guess 5 wasn't enough for a go getter like yourself!	x64.6M	14
Purple Amplifier (20)	Adds a new Amplifier stone to interact with at the Dawg Den!	x7.6M	14
Gloomie Lootie (46)	+5% Drop Rate for each Colony of Gloomie Mushrooms defeated! Drop rate here as in like, the one for stuff outside of the Caverns. @ Total Bonus: +{%	x135.4M	14
Variety Effect (38)	Strings give +30% more for each unique string type on your harp... I see you currently have $ different strings on your harp, so your strings are all worth #% more!	x173.3M	15
Gloomie Expie (47)	+25% Class EXP gain for each Colony of Gloomie Mushrooms defeated! @ Total Bonus: +{%	x22.6M	15
Gloomie Opie (48)	+10% Villager EXP gain for each Colony of Gloomie Mushrooms successfully romanced... or defeated, whichever is higher. @ Total Bonus: +{%	x28.9M	15
Noise Reduction Therapy (54)	Gives you a multiplicative 1.20x Stealth bonus for all ninjas for every Power of 10 Quaver Notes you have. @ Total Bonus: {x Stealth	x37M	15
Gloomie Mulch (44)	Gloomie mushrooms respawn +10% faster! In fact, ALL monsters across all the worlds of IdleOn respawn +10% faster!	x60.5M	16
Compound Interest (61)	You start with +1 more Court Coins every Power of 2 HRs of AFK time at the Justice Monument! So 2Hrs you get +1 coin, 4Hrs you get +2 coins, 8Hrs you get +3 coins, and so on!	x77.5M	16
Multitudinal Harp (35)	Adds +9999 more strings to the Harp! Haha nah just +1 string, figured I'd keep you on your toes! If I tricked you, you must go pluck the F string.	x99.2M	16
7rth Barckot?! (8)	Adds another bucket at the Well! You DO want more buckets, right?	x2B	17
White Amplifier (21)	Adds a new Amplifier stone to interact with at the Dawg Den!	x2.6B	17
Aye String (30)	Permanently unlocks a new String Type for the Harp! You can level it up just like any other string!	x340.8M	17
Last Bucket! (9)	Adds another bucket at the Well! And it's the last one too, I hope your bucket lust is satiated!	x5.5B	18
Big Jar Mach II (62)	Upgrades the main jar, doubling the base value of every rupie you find. So if you see 2 red rupies, you actually got 4!	x10	18
Supergiant Jars (71)	Jars now COMBINE to save space! 10 Jars becomes 1 large jar, which gives 10x rewards. 10 large jars become 1 giant jar, which gives 100x rewards. This continues forever!	x25	18
Evertree ~ Rupie Synergy (80)	Boosts overall Rupie value by 1.10x per Evertree Trunk you've whittled! @ Total Bonus: {x	x100	19
Break All Button (69)	Adds a new button to the top left of the Jar, allowing you to break all jars at once!	x200	19
Evertree Trickledown (79)	+15% All Skill Efficiency, and +10% All Skill EXP gain per Evertree Trunk you've whittled!	x400	19
Big Jar Mach III (63)	Upgrades the main jar, allowing you to produce 2 jar types at once!	x1.3K	20
Peer Reviewed Books (85)	Bolaia now get +7% Study Rate per LV, instead of the previous +5% per LV!	x1.9K	20
Jar Production Line (74)	The requirement to make a jar is 5% lower per POW 10 jars made of the previous type. For example, making 100 Simple Jars would mean Tall jars are 10% quicker to make!	x3.8K	20
Rock Smart (81)	After much thought, this schematic has decided to give +20% Monument AFK gain, and +2 Starting Attempts for the Wisdom Story per POW 10 Wisdom Monument Hours.	x5.7K	20
Sumptuous Harp (36)	Adds +1 more string to the Harp... all these strings really remind me of string cheese, I used to love it!	x13.8B	21
Horsey Gambit (89)	Unlocks the Horsey challenge in the Gambit cavern.	x17.3K	21
Big Jar Mach IV (64)	Upgrades the main jar, increasing the chance for multiple rupies in a jar by +50%	x26K	21
Bishop Gambit (90)	Unlocks the Bishop challenge in the Gambit cavern.	x52.4K	22
Collect 'Em All (76)	Gives a 1.02x chance to find a new collectible for every digit of all the rupies you own. @ Total Bonus: {x Collectible Chance	x78.9K	22
Max Monument Rewards (70)	Monument Reward Multi now increases at the normal rate of +100% daily for 4 full days! Before this upgrade, it was only 2 days...	x118.6K	22
Cutting Edge Research (87)	Bolaia now get a massive +10% Study Rate per LV, instead of the previous +7% per LV!	x239.1K	23
Queen Gambit (91)	Unlocks the Queen challenge in the Gambit cavern.	x359.7K	23
Big Jar Mach V (65)	Upgrades the main jar, doubling the base value of every rupie you find AGAIN! If 2 red rupies gave you 4 before, now it's 8!!!	x724.9K	23
The Sicilian (78)	+10% Total Gambit Score	x1.1M	24
Light Speed (72)	Every POW 10 white rupies you own increases the production rate of jars by +10% @ Total Bonus: +{% Jar Producton Rate	x1.6M	24
All This Ringing in my Ears (86)	When Ringing the Bell, there is now a 25% chance to get 2x more LVs than you otherwise would have gotten!	x3.3M	24
Big Jar Mach VI (66)	Upgrades the main jar, allowing you to produce 3 jar types at once!	x5M	25
Castle Gambit (92)	Unlocks the Castle challenge in the Gambit cavern.	x7.5M	25
Dark Amplifier (22)	Adds a new Amplifier stone to interact with at the Dawg Den!	x1.5T	25
Dark Luck (73)	Every POW 10 dark rupies you own increases the chance of enchanting collectibles from the Enchanted Jar by 1.10x @ Total Bonus: {x Enchantment	x22.7M	25
Sanctum of LOOT (82)	+20% Drop Rate for each Sanctum of Ancient Golems you've cleared! @ Total Bonus: +{%	x45.7M	26
Big Jar Mach VII (67)	Upgrades the main jar, reducing the production amount required to make jars by 30% so you can make them faster!	x68.7M	26
9th Bucket! (10)	Adds another bucket at the Well! Yea apparently there were a few more of these left!	x65.1T	26
Advanced Collection (75)	You can now find new collectible types from jars, found in the new 2nd page of your collection! Go collect 'em all!	x165.4M	27
Roaring Flame (77)	+25% chance to get DOUBLE the Torches from Ancient Golems when picking them up!	x221.6M	27
Sanctum of EXP (83)	+40% Class EXP for each Sanctum of Ancient Golems you've cleared! @ Total Bonus: +{%	x297M	27
Noob Gambit (93)	Unlocks the Noob challenge in the Gambit cavern.	x533.3M	28
Bucket Finale! (11)	Adds another bucket at the Well! And yea this one is actually the last one, I don't think an 11th would fit on screen!	x366.6T	28
Big Jar Mach VIII (68)	Upgrades the main jar, doubling the base value of every rupie you find! This does not stack with the other ones... just kidding it totally does! ANOTHER 2x RUPIES!!!	x957.6M	28
Billion Dollar Grant (88)	Bolaia now get a sumptuous +15% Study Rate per LV, instead of the previous +10% per LV!	x1B	29
Sanctum of DMG (84)	+100% Total Damage for each Sanctum of Ancient Golems you've cleared! @ Total Bonus: +{%	x2.3B	29
Rift Guy (51)	Hey bet you weren't expecting to see me here, huh? Well, that's just how it goes with me, it's in my blood. It's how I roll. Go ahead, create me. Or don't, I'll keep being me.	x1.6Q	29
Bee String (31)	Permanently unlocks a new String Type for the Harp! You can level it up just like any other string!	x163.9T	0

Bonuses

Each Level that Cosmo gains, you also gain 1 point to spend on various bonuses. There are three categories you can learn from:

• Hole Majik - boosts upgrades for The Hole
• Village Majik - Boosts your Villagers
• IdleOn Majik - Boosts your characters on your IdleOn account

Once you learn the Cosmo, Enhance! you can then upgrade the bonuses further.

Hole Majik

Village Majik

IdleOn Majik

Measure

For each Level that Minau gains, you'll unlock a new bonus you can upgrade using resources found at The Hole.

Each bonus also can be multiplied by other areas of IdleOn.

Bonus	Multi	Resource	Level
+% Villager Exp Gain	Tome Score		1
+% Bravery Sword Max Dmg	All Skill Lv		2
+% Bell Ring & Ping Rate	Deathnote Pts		3
+% Harp Note Gain	Slab Items		4
+% Daily Lamp Wishes	Crops Found		5
+% Bucket Fill Rate	Highest Dmg		6
+% Harp String Exp	Account Lv		7
+% Villager Exp Gain	Slab Items		8
+% Harp Note Gain	Tome Score		9
+% Multikill Per Tier	Gloomie Kills		10
+% Rupie Value	Studies Done		11
+% Monument Afk Rate	All Skill Lv		12
+% Jar Produce Spd	Account Lv		13
+% Gambit Points	Deathnote Pts		14
+% Rupie Value	Highest Dmg		15
+% Drop Rate	Golem Kills		16

Studies

Bolaia will learn various bonuses from The Caverns you have discovered in The Hole. Each bonus can then be studied to have it's own level increased.