Tayam, Luminous Enigma, Sengir, the Dark Baron, Ashnod's Altar, and Geralf's Messenger

Prerequisites

• Tayam, Luminous Enigma on the battlefield
• Sengir, the Dark Baron on the battlefield
• Ashnod's Altar on the battlefield
• Geralf's Messenger on the battlefield
• Geralf's Messenger does not have a +1/+1 counter on it
• available

Steps

1. Activate Ashnod's Altar by sacrificing Geralf's Messenger, adding
2. When Geralf's Messenger dies, its undying ability and Sengir's first ability trigger
3. Resolve the Geralf's Messenger trigger, returning it from your graveyard to the battlefield with a +1/+1 counter and a vigilance counter on it
4. When Geralf's Messenger enters the battlefield, it triggers, causing an opponent to lose 2 life
5. Resolve the Sengir trigger, putting two +1/+1 counters on Sengir
6. Activate Tayam by paying , removing a +1/+1 counter from Sengir, and both counters from Geralf's Messenger
7. Holding priority, activate Ashnod's Altar by sacrificing Geralf's Messenger, adding
8. Repeat steps 2-5 one additional time
9. Activate Ashnod's Altar by sacrificing Geralf's Messenger, adding
10. Resolve Tayam's ability from step 6, causing you to mill three cards and returning Geralf's Messenger from your graveyard to the battlefield
11. When Geralf's Messenger enters the battlefield, it triggers, causing an opponent to lose 2 life
12. Repeat

Results

• Infinite +1/+1 counters on Sengir
• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite lifeloss
• Infinite LTB
• Infinite sacrifice triggers
• Infinite self-mill
• Put all permanents with mana value three or less from your graveyard and library onto the battlefield