Havengul Lich, Grimgrin, Corpse-Born, Greedy Freebooter, and Enduring Vitality

Prerequisites

• Havengul Lich on the battlefield
• Grimgrin, Corpse-Born on the battlefield
• Greedy Freebooter on the battlefield
• Enduring Vitality on the battlefield

Steps

1. Activate Grimgrin's ability from Enduring Vitality by tapping Grimgrin, adding one mana
2. Activate Grimgrin by sacrificing Greedy Freebooter, untapping Grimgrin and putting a +1/+1 counter on it
3. When Greedy Freebooter dies, it triggers, causing you to scry 1 and create a Treasure token
4. Activate the Treasure token by tapping and sacrificing it, adding one mana
5. Activate Havengul Lich by paying , allowing you to cast Greedy Freebooter from your graveyard this turn
6. Cast Greedy Freebooter from your graveyard by paying its casting cost
7. Repeat

Results

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