Ice-o-pede

 Ice-o-pede appears in What is Life?, where Ice King is seen riding it and commands Ice-o-pede to attack Finn. Accidentally, it attacks Ice King instead. Ice-o-pede may be a centipede made out of ice becuase it dosn't have alot of legs.

Trivia
Ice-o-pede is a pun for centepede or maybe even millapede