Zuko, Relentless Exile

When Zuko enters the battlefield, put a Bounty counter on target creature or planeswalker you don't control.
If a permanent with a bounty counter on it dies during your turn, it's owner loses 10 life.
Whenever Zuko attacks, he gets -1/-1 for
each other attacking creature.
If Zuko would die, instead you may transform it.