Knull, Ruler of the Dark

Whenever Knull, Ruler of the Dark enters or deals combat damage to a player, give Knull, Ruler of the Dark +1/+1

{1}{r}, pay 2 life, remove +1/+1 counter from Knull,
Ruler of the Dark: Create +1/+1 black Symbiote Blob artifact creature token with "Find Host: equip Symbiote Blob to creature. Target creature become a Symbiote in addition to its other creature types with power and toughness equal to its base power and toughness +3."