Mikaeus, the Unhallowed, Blood Pet, Hex Parasite, and Pawn of Ulamog

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Blood Pet on the battlefield
• Hex Parasite on the battlefield
• Pawn of Ulamog on the battlefield
• Blood Pet does not have a +1/+1 counter on it

Steps

1. Activate Blood Pet by sacrificing it, adding
2. When Blood Pet dies, its undying ability and Pawn of Ulamog 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 Pawn of Ulamog trigger, creating a 0/1 Eldrazi Spawn creature token
5. Activate the Eldrazi Spawn 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

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinitely powerful Hex Parasite until end of turn
• Infinite sacrifice triggers