Obelisk Seeker

Flying, deathtouch, haste
Whenever Obelisk Seeker deals combat damage
to an opponent, put a +1/+1 counter on Obelisk
Seeker.
Remnant — {1}{b}, Sacrifice a creature, exile
Obelisk Seeker from your graveyard: target
opponent loses life equal to the sacrificed
creature's power.