Lumpy Space Princess

Flying

The Lumps —Whenever Lumpy Space Princess deals damage to a creature put a lump counter on it.
As long as it has a lump counter it has base power
and toughness 1/1, becomes an alien in addition to
its other types, loses all abilities and gains flying.

"It just means he's changing into a Lumpy Space guy
on account of my bite. It's just like um...you know
...werewolf rules."