Irma, Part-Time Mutant Foil

Legendary Creature — Human Mutant Shapeshifter

At the beginning of combat on your turn, Irma becomes a copy of up to one other target creature you control, except her name is Irma, Part-Time Mutant and she has this ability. Then put a +1/+1 counter on her.

"I'm not trying to cause trouble. Trouble just follows me around."