Ashnod's Altar + Dualcaster Mage + Living Death

Prerequisites

• You have a creature card in your graveyard.

Steps

1. 1Cast Living Death by paying its mana cost
2. 2Holding priority, cast Dualcaster Mage by paying its mana cost.
3. 3When Dualcaster Mage enters, it triggers, targeting Living Death.
4. 4Holding priority, activate Ashnod's Altar by sacrificing Dualcaster Mage.
5. 5Resolve the Dualcaster Mage trigger, copying Living Death
6. 6Resolve the Living Death copy, causing each player to exile all creature cards from their graveyard, sacrifice all creatures they control, and returning all cards exiled this way to the battlefield under their owner's control.
7. 7Repeat from step 3.

Effects

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite magecraft triggers
• Infinite recursion of creature cards in your graveyard
• Infinite sacrifice triggers