Ruga, Exiled Agent

Flying, first strike
Whenever a creature dealt damage by Ruga,
Exiled Agent this turn dies, exile it, then if the
total power of creatures exiled by Ruga is 10 or
more, exile him, then return him to the
battlefield transformed under his owner's control.
"The Aurora hated my worldview, so I was given a
choice: life of exile, or public execution."