Living Death, Eternal Witness, and Phyrexian Altar

Prerequisites

• Living Death in hand
• Eternal Witness on the battlefield
• Phyrexian Altar on the battlefield
• at most available

Steps

1. Activate Phyrexian Altar by sacrificing Eternal Witness and all other creatures you control, adding for each creature sacrificed
2. Cast Living Death by paying , causing each player to exile all creatures from their graveyard, sacrifice all creatures they control, then return the exiled cards to the battlefield
3. When Eternal Witness enters the battlefield, it triggers, returning Living Death from your graveyard to your hand
4. Repeat any number of times

Results

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