Requires

Steps

1. Activate Blood Pet by sacrificing it, adding .
2. When Blood Pet dies, its undying ability and Sifter of Skulls trigger.
3. Resolve the Blood Pet trigger, returning it to the battlefield from your graveyard with a +1/+1 counter on it.
4. Resolve the Sifter of Skulls trigger, creating a 1/1 Eldrazi Scion creature token.
5. Activate the Eldrazi Scion by sacrificing it, adding .
6. Activate Hex Parasite by paying and removing the +1/+1 counter from Blood Pet, giving Hex Parasite +1/+0 until end of turn.
7. Repeat.

Results