Metapod

Mutate 1{g},
If this creatures name is Metapod, it can't attack
or block.
When this creature takes damage, if its name is Metapod, you may cast Butterfree, for its mutate
cost, targeting Metapod, from your hand,
graveyard or library.
"This is its pre-evolved form. At this stage, it can only harden, so it remains motionless to avoid attack."