Minerva McGonagall

{w}, {t}: target creature loses all counters and
returns to their original state
{u}{g}, {t}: target creature becomes a 1/1 blue toad
and loses all other card types and abilities until
this card leaves the battlefield
{2}{u}{r}, {t}: target creature becomes a 5/5 red
dragon with flying and loses all other card
types and abilities until this card leaves the battlefield