Colfenor, the Last Yew, Ashnod's Altar, Shifting Wall, and Phyrexian Marauder

Prerequisites

• Colfenor, the Last Yew on the battlefield
• Ashnod's Altar on the battlefield
• Shifting Wall on the battlefield
• Phyrexian Marauder 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 Phyrexian Marauder from your graveyard to your hand
3. Cast Phyrexian Marauder for
4. Sacrifice Phyrexian Marauder 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