Mistriss of Masks

Switcharoo {1}{u}{u} ({1}{u}{u}, {t}: Mistriss of Masks and target attacking creature each become a copy of the other until end of turn.)
Whenever a creature becomes a target of this creature's Switcharoo ability, it gains Switcharoo {1}{u}{u} and gains this ability.
"Anyone can wear one of my masks. Then anyone can become everyone!"