Living Death, Ashnod's Altar, Blood Vassal, and Eternal Witness

Prerequisites

• Living Death in hand
• Ashnod's Altar on the battlefield
• Blood Vassal on the battlefield
• Eternal Witness on the battlefield
• You control at least one additional nontoken creature

Steps

1. Activate Blood Vassal by sacrificing it, adding
2. Activate Ashnod's Altar twice by sacrificing Eternal Witness and another nontoken creature, adding
3. Cast Living Death by paying , causing each player to exile all creature cards in their graveyards, sacrifice all creatures they control, then put all cards exiled this way onto the battlefield
4. When Eternal Witness enters the battlefield, it triggers, returning Living Death to your hand from your graveyard
5. Repeat

Results

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