Havengul Lich, Grimgrin, Corpse-Born, Utopia Vow, and Diregraf Colossus

Prerequisites

• Havengul Lich on the battlefield
• Grimgrin, Corpse-Born on the battlefield
• Utopia Vow on the battlefield
• Diregraf Colossus on the battlefield

Steps

1. Activate Grimgrin's ability from Utopia Vow by tapping Grimgrin, adding one mana
2. Activate Grimgrin by sacrificing the zombie castable for one mana, untapping Grimgrin and putting a +1/+1 counter on it
3. Activate Grimgrin's ability from Utopia Vow by tapping Grimgrin, adding one mana
4. Activate Havengul Lich by paying , allowing you to cast the zombie castable for one mana from your graveyard this turn
5. Cast that zombie spell from your graveyard by paying it mana cost
6. When you cast that zombie or when it enters, Diregraf Colossus triggers, creating a creature token
7. Activate Grimgrin by sacrificing the creature token, untapping Grimgrin and putting a +1/+1 counter on it
8. Repeat

Results

• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite storm count