Living Death, Dualcaster Mage, and Ashnod's Altar

Prerequisites

• Living Death in hand
• Dualcaster Mage in hand
• Ashnod's Altar on the battlefield
• available

Steps

1. Cast Living Death by paying
2. Holding priority, cast Dualcaster Mage by paying
3. Dualcaster Mage enters the battlefield, copying Living Death
4. Holding priority, Activate Ashnod's Altar by sacrificing Dualcaster Mage, adding
5. Resolve the Living Death copy, exiling all creatures from graveyard, then sacrifices all creatures, then putting all cards exiled this way onto the battlefield
6. Repeat from step 3

Results

• Infinite colorless mana
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers