Enduring Renewal, Priest of Urabrask, and Grimgrin, Corpse-Born

Prerequisites

• Enduring Renewal on the battlefield
• Priest of Urabrask in hand
• Grimgrin, Corpse-Born on the battlefield
• available

Steps

1. Cast Priest of Urabrask by paying its mana cost
2. When Priest of Urabrask enters, it triggers, adding
3. Activate Grimgrin by sacrificing Priest of Urabrask
4. When Priest of Urabrask dies, Enduring Renewal triggers, returning Priest of Urabrask from your graveyard to your hand
5. Resolve the Grimgrin ability, putting a +1/+1 counter on Grimgrin and untapping it
6. 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