A form of poisonous, caterpillar-like beast. They're evil. They'll attack people on sight just because they can, for the sake of bringing misery. Beginner Signers are advised to beware of them when venturing into forests.

In-game description

The IosGrubb is the Stage 1 form of the Ruin group.


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Wild IosGrubbs can be encountered and signed in the Cradlewood. They are also used by the enemy signers Isaac and Daniel in the Annoying Cave, and those participating in the Random Tournament.


Base Statistics
HP: 32
MP: 28
ATK: 36
DEF: 26
M.ATK: 22
M.DEF: 30
SPD: 28
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IosGrubbs learn Soften, a Larval-type technique. They can also use any Larval or Insect techniques that their ancestors learned.


An IosGrubb can be evolved from a Ruin Egg. It can evolve into three different forms:


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