Abby, Merciless Soldier, Ashnod's Altar, Mirror of Life Trapping, and Earthcraft

Prerequisites

• Abby, Merciless Soldier in the command zone
• Ashnod's Altar on the battlefield
• Mirror of Life Trapping on the battlefield
• Earthcraft on the battlefield
• plus commander tax if applicable available

Steps

1. Cast Abby from the command zone by paying plus commander tax if applicable
2. Abby triggers, creating a number of 1/1 Fungus Zombie creature tokens named Cordyceps Infected equal to the amount of mana spent to cast it
3. When Abby enters under an opponent's control, Mirror of Life Trapping triggers, exiling Abby
4. Choose to return Abby from exile to the command zone
5. Activate Earthcraft twice by tapping two Cordyceps Infected tokens, untapping a basic Mountain and Forest
6. Activate the Mountain and Forest by tapping them, adding
7. Activate Ashnod's Altar by sacrificing a Cordyceps Infected token, adding
8. Repeat step 7 until you have enough mana to cast Abby
9. Repeat from step 1

Results

• Infinite ETB
• Infinite LTB
• Infinite colorless mana
• Infinite commander casts
• Infinite creature tokens
• Infinite death triggers
• Infinite green mana
• Infinite mana basic lands you control can produce
• Infinite red mana
• Infinite sacrifice triggers
• Infinite storm count
• Infinite untap of basic lands you control