Cavecreep

The Cavecreep is a cave variation of the Creeper that's slightly deadlier and scarier than his surface counterpart.

Spawning
Cavecreeps replace Creepers at y=60 and below. However, due to Cavecreeps being considered a Creeper variant, they will be replaced by other mobs in certain circumstances (Silverfish in Strongholds, Zombie Villagers in Mansions etc.). You can learn more about the spawning system in "More Mobs" here. Click here to find out how Creepers spawn.

You can also summon a Cavecreep using this command: /function imm:summon/imm/cavecreep. You can obtain a Cavecreep Spawn Frame with this command: /function imm:spawn_frame/imm/cavecreep. Make sure to replace the 'imm' portion with whatever version you're playing on if your version is older than Snapshot 3C (example: Snapshot 2A = imm2a).

Behavior
Cavecreeps behave the same way as normal Creepers. However, their fuse duration is different. You can scroll down to the 'Data values' section to learn more. Click here for an exert on Creeper behavior from the official Minecraft wiki.

Fighting Strategy
Cavecreeps aren't too different from regular Creepers. You could approach them the same way. For example by hitting them and quickly running backwards to insure they don't explode, but keep in mind that despite their fuse being longer their explosion radius is much bigger and can kill you even in high-tier armor. Keep your distance with the Cavecreep and try your best to apply as much damage as possible per hit. If possible, don't even attempt to fight them up-close and just kill them with range weapons.

Drops
You can retrieve the following from a dead Cavecreep:
 * 0-2 Cavecreep Hides
 * 5 experience
 * Cavecreep Head (if killed by a charged Creeper or Cavecreep)
 * Music Disc (if killed by a Skeleton or a Stray)

Data values
Most of data values possessed by the Cavecreep are shared with regular Creepers, with a few exceptions. Click here to see the data values of Creepers on the official Minecraft wiki.
 * Fuse: 100
 * ExplosionRadius: 5
 * Tags: iMM, iMMOverworld, iMM_Cavecreep
 * CustomName: {"translate":"imm.entity.cavecreep"} (§7Cavecreep in English US)
 * CustomNameVisible: 0
 * DeathLootTable: imm:entities/imm/cavecreep

Advancements
The Cavecreep is considered a regular Creeper and can be required for the following advancements (which are all from vanilla Minecraft):
 * Adventure
 * Monster Hunter

The Cavecreep is also required to be killed for the following "More Mobs" advancements:
 * Monsters hunted
 * Monster Fighter

Also the Cavecreep is indirectly related to the "Two Faces Are Better Than One" advancement, which is granted for having a Cavecreep Head in the inventory, which can only be dropped by Cavecreeps.
 * Mob Fighter

Known issues
There are currently no important known issues with this mob.