Colfenor, the Last Yew, Ashnod's Altar, Shifting Wall, and Stonecoil Serpent

Prerequisites

• Colfenor, the Last Yew on the battlefield
• Ashnod's Altar on the battlefield
• Shifting Wall on the battlefield
• Stonecoil Serpent in the graveyard
• At least one +1/+1 counter on Shifting Wall

Steps

1. Sacrifice Shifting Wall to Ashnod's Altar for
2. Colfenor triggers, returning Stonecoil Serpent from your graveyard to your hand
3. Cast Stonecoil Serpent for
4. Sacrifice Stonecoil Serpent to Ashnod's Altar for
5. Colfenor triggers, returning Shifting Wall from your graveyard to your hand
6. Cast Shifting Wall for
7. Repeat

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count