Blood Funnel, Corpse Dance, and Witch Engine

Prerequisites

• Blood Funnel on the battlefield
• Corpse Dance in hand
• Witch Engine on the battlefield
• Witch Engine does not have summoning sickness
• available

Steps

1. Activate Witch Engine by tapping it
2. Holding priority, cast Corpse Dance with buyback by paying due to Blood Funnel
3. Blood Funnel triggers, causing you to sacrifice Witch Engine
4. Resolve Corpse Dance, returning Witch Engine from your graveyard to the battlefield, giving it haste, and returning Corpse Dance to your hand
5. Resolve the Witch Engine ability from step 1, adding and failing to give an opponent control of Witch Engine as it is a new object
6. Repeat

Results

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