Kralgan, Queen's Assassin

Deathtouch
When Kralgan enters the battlefield, put a
bounty counter on up to one target creature.
Feast - Whenever a nontoken creature dies, you
may tap Kralgan, if you do, put a feast counter
on it.
Creatures with bounty counters on them get
-1/-1 for each feast counter on Kraglan.
Whenever a creature with a bounty counter on it
dies, put a bounty counter on up to one target creature.