Qorquv, by Death

Indestructible, deathtouch
At the beginning of your upkeep put a -1/-1
counter on up to two target creatures.
At the beginning of each player's upkeep all creatures get +X/-X where X is the number of
-1/-1 counters on that creature.
You can't see it, but it's here, the stench of death
follows it everywhere.