The Reindeer is a limited pet, if you kill a monster (including player monsters), has a chance to explode upon death, dealing extra damage around them, It has been added in the Christmas Event of 2021 and returned in the 2023 Christmas Event for a second chance.
It is the useful pet that will explode one monster upon death and damages other monsters while shooting with your gun. It is useful for hoards of zombies and the Demon Overlord boss because if you kill one of the zombies in a hoard, it will deal big damage to other zombies around you. It is useful for the Demon Overlord boss because if you kill one of the Demon Overlord's minions right near the boss, it will deal damage to it and other minions.
This pet can be only obtained by collecting all 100 presents. You can get presents by killing any monster, most specifically Elf Raiders.

The Reindeer In-game
Trivia[]
- It is the explosive giver type of pet that will grant you the ability chance with your gun.
- It's explosion effect color is the same as the Tree Launcher's explosion effect color.
- It cannot be effective upon death on bosses and meteors.
- It is also cannot grant Explosive Weapons and Melee.
- It will not make an exploding sound while killing monsters, but still shake your screen, unlike Explosive Zombies,