Witch Engine + Corpse Dance + Ashnod's Altar

Prerequisites

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Steps

1. 1Activate Witch Engine by tapping it, targeting any opponent.
2. 2Holding priority, activate Ashnod's Altar by sacrificing Witch Engine, adding .
3. 3Resolve the Witch Engine ability, adding and not giving control of Witch Engine to an opponent due to it no longer being on the battlefield.
4. 4Cast Corpse Dance with buyback by paying , returning Witch Engine from your graveyard to the battlefield with haste, and returning Corpse Dance to your hand.
5. 5Repeat.

Effects

• Infinite black mana
• Infinite colorless mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite magecraft triggers
• Infinite storm count