Evil Santa

At the beginning of your end step, target
opponent gains control of up to one target
creature you control. Put two +1/+1 counters on
it and tap it. It's goaded for the rest of the game
and it gains "This creature can't be sacrificed."
(It attacks each combat if able and attacks a player
other than you if able.)
Whenever a creature you own but don't control
attacks, you draw a card.