Ob Nixilis, Unshackled

Ob Nixilis, Unshackled

Legendary Creature - Demon | Power/Toughness: 4 / 4 (CMC 6)
Flying, trample
Whenever an opponent searches their library, that player sacrifices a creature and loses 10 life.
Whenever another creature dies, put a +1/+1 counter on Ob Nixilis, Unshackled.