Goblin Necromancer

{t}: Choose target creature in a graveyard, and flip
a coin. If you win the flip, put that creature into
play under your control. If you lose the flip,
Goblin Necromancer loses all abilities and target opponent gains control of it. It becomes an exact
copy of target creature except it's still named
Goblin Necromancer, is a black and red Zombie,
and has "During your upkeep, flip a coin. If you
lose the flip, exile this permanent, then return it
to play under its owner's control."