Reincarnation, Dualcaster Mage, and Phyrexian Altar

Prerequisites

• Reincarnation in hand
• Dualcaster Mage in hand
• Phyrexian Altar on the battlefield
• available

Steps

1. Cast Reincarnation by paying , targeting any creature
2. Holding priority, cast Dualcaster Mage by paying
3. Dualcaster Mage enters the battlefield, copying Reincarnation, targeting Dualcaster Mage
4. Resolve the copy of Reincarnation
5. Activate Phyrexian Altar by sacrificing Dualcaster Mage, adding one mana of any color
6. Dualcaster Mage dies, triggering Reincarnation, returning Dualcaster Mage from your graveyard to the battlefield
7. Repeat from step 3

Results

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