The One That Picks You

Squashling creature cards you own have Mutate
X where X is that creature's converted mana
cost. You still pay that creature's colored mana
symbols if you cast a creature card this way.
The One That Picks You has all activated
abilities of creature cards your opponent's
control that died this turn.

"What is this, little one? An arm that snaps like
a twig? I had hundreds of those."