The Caverns - IdleOn

The Caverns are a set of areas you unlock through The Hole in World 5 of IdleOn. Each Cavern has a different function and it's own mechanics that provide bonuses, resources and more for your IdleOn account.

• The Well - Cavern I
• The Motherlode - Cavern II
• The Dawg Den - Cavern III
• The Bravery Monument - Cavern IV
• The Bell - Cavern V
• The Harp - Cavern VI
• The Lamp - Cavern VII
• The Hive - Cavern VIII
• The Gloomie Grotto - Cavern IX
• The Justice Monument - Cavern X
• The Jar - Cavern XI
• The Evertree - Cavern XII
• The Wisdom Monument - Cavern XIII
• The Gambit - Cavern XIV
• The Sactum Temple - Cavern XV

In order to unlock the different Caverns, you need to Level Up your Explorer Villager from The Hole. As mentioned in The Hole article, a villager gains EXP over time based on how many Opals they have invested in them.

There are a total of 15 Caverns to unlock. You can find your Caverns by clicking on the hole area at the map Smolderin Plateau / The Hole.

The Well - Cavern I

The first Cavern you unlock is called The Well. Here you will obtain rock resources over time by filling up your buckets.

Each bucket you have can be assigned to collect resources from a different layer of The Well. In order to reveal the different levels of resources, you need to first remove the Rock Layer by assigning your buckets to collect the rocks from that layer.

You can unlock more Buckets via the Engineer Villager at The Hole.

When you unlock the Engineer Schematic Bar Expand-o-rama you can then expand any full bar so you can hold more of that rock. Expanding will reset your rock resources to 0.

Selecting the option to Auto-Expand will automatically expand the bar when it is full (and also resetting your rock resources to 0).

You can also earn Opals by spending your Gravel resource at The Well. Each time you purchase an Opal, the amount of Gravel needed for the next opal is increased.

There are currently a total of 10 different layers from the well you can collect from:

 

You can also gain the following based on The Well resources you have:

The Well Boosts

To help boost The Well Cavern, you can unlock various bonuses throughout The Hole.

The Motherlode - Cavern II

The Motherlode is a giant rock that you can Mine.

When you mine the Motherlode, you will reduce the layer bar. When it reaches zero, you can destroy the layer and earn an Opal.

Each time you destroy a layer, the Mining Efficiency needed increases, as well as how many Ore you need to mine to destroy the next layer.

You can also earn several bonuses from other areas of The Hole based on how many layers of The Motherlode you have destroyed:

The Dawg Den - Cavern III

The Dawg Den is where you fight waves and waves of hounds that get progressively stronger and stronger.

The hound mobs will incite fear the longer they stay on the map; when your fear bar is full it is game over.

You'll earn 1x Opal once you reach a certain score.

You can increase how many points you earn per kill based on Amplifiers. Amplifiers are unlocked through the Engineer Schematics.

Each Amplifier can be increased up to 100 times by clicking on it, which affects your overall Score Multiplier.

Amplifiers

Below you can find all the Amplifiers, all of which can be unlocked from the Engineer Villager at The Hole.

The Den Boosts

Based on how much you progress in The Den, you can also gain these boosts:

The Bravery Monument - Cavern IV

The Bravery Monument is a mini-game that unlocks several account-wide bonuses that stack each time you play.

The Bravery Monument also has several boosts that you unlock by AFKing at the Monument (you can't use Time Candies!).

When you click the Tell Me A Story, you'll have to use your Swords to deal damage. Each Sword can roll a minium~maximum amount of damage. If you defeat the round, you can select one of three bonuses.

If you lose the round, you'll lose any bonuses you have selected for that mini-game play. If you select Run Away, the bonuses are permanently added to your account!

Re-throws allow you to re-throw a sword, however, they will reduce your min-max damage bonus.

Retelling allows you to restart the entire level with all previous bonuses in tact (including Rethrows + min-max damage).

AFK Boosts

The following Bravery Bonuses can be unlocked by AFKing:

Bravery Stats

Below you can find all the Bonuses that you can gain from playing the Bravery Monument.

Bravery Monument Bonuses

You can enhance the Bravery Monument with these bonuses:

The Bell - Cavern V

The Bell cavern presents a giant bell that you can ring for various bonuses. 

There are several options for the Bell:

• Ring Bell - Gives +1 level of a random bonus
• Ping Bell - Gives an Opal
• Clean Bell - Clean the bell to unlock an Improvement Method
• Renew Bell - Resets all bonuses but you keep improvement methods and opals earned

You can only ring a bell once it's meter has filled up. You can only charge one bell at a time; once it reaches 100%, it will then continue to charge so you can ring it potentially multiple times.

Ringing Bell

The following bonuses are available to level up when using the Ringing Bell option:

• +% Bucket Fill Rate
• +% All Villager EXP Rate
• +% Harp Note Gains
• +% Daily Lamp Wishes
• +% Extra Ruper Chance
• +% Double Torch Chance

Cleaning Bell

The following Improvement Methods can be unlocked by cleaning the bell, which can be further upgraded using a specific resource.

The Bell Bonuses

You can enhance The Bell with these bonuses:

The Harp - Cavern VI

The Harp allows you to earn a variety of note resources that can be used to upgrade various bonuses within The Hole.

When the Harp Power is charged (over time), you can then pluck the strings on The Harp to earn the note resources.

Each String can be adjusted to a different note, with each Note giving various bonuses.

You can also tune The Harp to learn different note resources that are earned when plucking the strings.

Harp Notes

Each Harp Note resource can be learned by purchasing it from The Harp NPC.

String Adjustments

Each Note that you have learned can be assigned to each string of The Harp. You learn the different note types from the Engineer Villager.

When a note is plucked, it will gain EXP based on your Harp Power.

 

The Harp Bonuses

You can enhance The Harp with these bonuses:

The Lamp - Cavern VII

Each day at The Lamp you gain a wish (which can be increased by a variety of bonuses in The Hole).

When you Wish for More Wishes, you will unlock a brand new Wish you can upgrade. The cost of upgrading Wishes scales differently for each one.

The following Wishes are available:

The Lamp Bonuses

You can enhance The Lamp with these bonuses:

The Hive - Cavern VIII

The Hive is Cavern 8 and is another "skilling cavern". You need to use your Catching Skill to remove different levels.

You will get 1 Opal per Hive destroyed, with the Catching Efficiency requirement increasing for every level you beat.

You can also earn several bonuses from other areas of The Hole based on how many layers of The Hive you have destroyed:

The Gloomie Grotto - Cavern IX

The Gloomie Grotto cavern requires you to defeat a specific amount of Gloomie mobs in order to challenge the Grotto boss, known as The Monarch.

Gloomies will spawn periodically in the Cavern, with each kill reducing the kill count required to fight the boss. 

Once you defeat the boss, you'll be given an Opal and move onto the next round, where the amount of Gloomies to kill increases.

Bonuses

These bonuses are also available based on your progress in the Gloomie Grotto:

The Justice Monument - Cavern X

The Justice Monument is another mini-game you can play each day where you can gain permanent account-wide bonuses.

The mini-game involves you playing out a series of scenarios where you must either Accept, Reject or Dismiss.

You have four stats to keep an eye on:

• Mental Health
• Coins
• Popularity
• Dismissals

If you end up with 0 Mental Health, it's game over.

Every 5 levels, the Grim Reaper appears and asks you to pay a fine. If you reject his request, you'll lose a Mental Health. There are also other requests that can do the same.

Rewards come in the form of Treasure Chests, which you can earn through several of the scenarios available in the game. Once you get Game Over, you'll be able to open all of the chests you have earned.

AFK Boosts

You can unlock several Monument bonuses by AFKING in the Cavern:

Justice Stats

Below you can find all the Bonuses that you can gain from playing the Justice Monument.

Justice Monument Bonuses

These bonuses can also help you with the Justice Monument game:

The Jar - Cavern XI

The Jar allows you to collect special rupies that you can spend on various upgrades in The Hole. There are also several other account-wide bonuses to unlock by collecting "collectable" rupies.

The Jar will generate jars over time that you can break to collect their rewards. You can select the type of Jar you wish to generate depending on your purpose. Jars unlock as you earn more rupies.

Unlocking the Engineer Schematic Jar Production Line will lower the amount of time a Jar is needed to be created based on how many on the previous Jar you have broken.

You can produce multiple jars at once by unlocking Engineer Schematics.

Jar Types

Jar Collectibles

Collectibles can be found from Jars that give boosts to your Jar Production and other caverns.

You can find Collectibles from the Ornate Jar, and also enchant a Collectible using the Enchanted Jar.

The Jar Upgrades and Bonuses

The Jar can be upgraded through a variety of methods and also gives extra bonuses for other areas:

The Evertree - Cavern XII

The Evertree is Cavern 12 and is another "skilling cavern". You need to use your Chopping Skill to remove different levels.

You will get 1 Opal per Trunk destroyed, with the Chopping Efficiency requirement increasing for every level you beat.

You can also earn several bonuses from other areas of The Hole based on how many layers of The Hive you have destroyed:

The Wisdom Monument - Cavern XIII

The Wisdom Monument is another mini-game that you can AFK at to unlock various rewards.

The mini-game is a memory game where you need to match tiles to complete a round. Each round increases the amount of tiles you need to match.

AFK Boosts

You can unlock several Monument bonuses by AFKING in the Cavern:

Wisdom Stats

Below you can find all the Bonuses that you can gain from playing the Wisdom Monument.

Wisdom Monument Bonuses

These bonuses can also help you with the Wisdom Monument game:

The Gambit - Cavern XIV

The Gambit is an area where you face off against 6 different Gambit Opponents in a round of Summoning.

Each Gambit has different rules for the battle, and you gain Gambit Points the longer you last.

Your Gambit Points are based on your best survival time:

• 100 points per second of survival
• +300 points every 10 seconds
• +1,000 points every 1 minute

Based on the total amount of Gambit Points you have earned, you'll also unlock account-wide bonuses.

The following bonuses can be unlocked once you reach a total Gambit Point score:

Gambit Bonuses

These bonuses can also help you with the Gambit game:

The Sactum Temple

The Temple is where Ancient Golem mobs spawn; when they are defeated, they'll drop a Green Torch item that is auto-consumed.

You can then use your Torch Points to either:

• Illuminate
• Search
• Amplify

Illuminate increases the chance of Search working. 

Search will give you a % chance to awaken the Centurion, the boss of the Temple. The Centurion spawns with lots of HP and once defeated, you'll earn +1 Opal and the chance to Search is decreased, making it harder to summon the next Centurion.

The Ancient Golem mob also drops the Dragon Statue item for the Statue Man.

Temple Bonuses

These bonuses can also help you with the Temple game: