Havengul Lich, Grimgrin, Corpse-Born, Earthcraft, and Shambling Ghast

Prerequisites

• Havengul Lich on the battlefield
• Grimgrin, Corpse-Born on the battlefield
• Earthcraft on the battlefield
• Shambling Ghast on the battlefield

Steps

1. Activate a basic land by tapping it, adding one mana
2. Activate Earthcraft by tapping Grimgrin, untapping a basic land
3. Activate a basic land by tapping it, adding one mana
4. Activate Earthcraft by tapping Shambling Ghast, untapping a basic land
5. Activate Grimgrin by sacrificing Shambling Ghast, untapping Grimgrin and putting a +1/+1 counter on it
6. When Shambling Ghast dies, it triggers, creating a Treasure token
7. Activate the Treasure token by tapping and sacrificing it, adding one mana
8. Activate Havengul Lich by paying , allowing you to cast Shambling Ghast from your graveyard this turn
9. Cast Shambling Ghast from your graveyard by paying its casting cost
10. Repeat
11. Once you have infinite mana, you can repeat the loop but choose to give a creature -1/-1 in step 6 instead of creating Treasure, causing all creatures your opponents control to die

Results

• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite storm count
• Destroy all creatures opponents control
• Infinite mana basic lands you control can produce
• Infinite untap of basic lands you control