Overcharged Crustoise Egg
Overcharged Crustoise Egg is a rare one-handed throwable item.
Can be used to spawn a creature called overcharged crustoise.
These “eggs” are really just highly incubated versions of creatures, used by altas during research, often for simulation purposes, which is why they tend to be friendly to their owner.
Ingame
Species descriptions:
- Alta: A brave little crippit is ready to settle in its new crystal home!
Sources
Can be obtained via 
Spawnable Item Pack or 
Technical Information
- In-game ID:
ct_overcharged_crustoise_egg - Power:
3.0 - Rarity:
Rare - Tags:
monster_egg,rare,spawner,throwable - File:
/items/active/alta/spawners/monsters/ct_overcharged_crustoise_egg.activeitem