Phyrexian Altar, Naru Meha, Master Wizard, and Living Death

Prerequisites

• Phyrexian Altar on the battlefield
• Naru Meha, Master Wizard in hand
• Living Death in hand
• available

Steps

1. Cast Living Death by paying its mana cost Holding priority, cast Naru Meha by paying its mana cost
2. When Naru Meha enters, it triggers, targeting Living Death
3. Holding priority, activate Phyrexian Altar by sacrificing Naru Meha
4. Resolve the Naru Meha trigger, copying Living Death Resolve 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
5. Repeat from step 3

Results

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