Colfenor, the Last Yew, Ashnod's Altar, Walking Ballista, and Phyrexian Marauder

Prerequisites

• Colfenor, the Last Yew on the battlefield
• Ashnod's Altar on the battlefield
• Walking Ballista on the battlefield
• Phyrexian Marauder in the graveyard
• At least one +1/+1 counter on Walking Ballista

Steps

1. Sacrifice Walking Ballista 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 Walking Ballista from your graveyard to your hand
6. Cast Walking Ballista for
7. Repeat

Results

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