Koll, the Forgemaster, Sai of the Shinobi, and Ashnod's Altar

Prerequisites

• Koll, the Forgemaster on the battlefield
• Sai of the Shinobi on the battlefield
• Ashnod's Altar on the battlefield
• You have a creature card in hand that can be cast using
• You have enough mana to cast the creature card in hand

Steps

1. Cast the creature by paying its mana cost
2. When the creature enters the battlefield, Sai of the Shinobi triggers, attaching Sai of the Shinobi to the creature
3. Activate Ashnod's Altar by sacrificing the creature, adding
4. When the creature dies, Koll triggers, returning the creature from your graveyard to your hand
5. Repeat

Results

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