Corpse Dance, Dualcaster Mage, and Phyrexian Altar

Prerequisites

• Corpse Dance in hand
• Dualcaster Mage in hand
• Phyrexian Altar on the battlefield
• available

Steps

1. Cast Corpse Dance by paying
2. Holding priority, cast Dualcaster Mage by paying
3. When Dualcaster Mage enters the battlefield, it triggers, creating a copy of Corpse Dance
4. Activate Phyrexian Altar by sacrificing Dualcaster Mage, adding one mana of any color
5. Resolve the copy of Corpse Dance, returning Dualcaster Mage from your graveyard to the battlefield
6. Repeat from step 3

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite magecraft triggers
• Infinite sacrifice triggers