Requires

Tayam, Luminous Enigma must be on the battlefield. Sengir, the Dark Baron must be on the battlefield. Ashnod's Altar must be on the battlefield. Geralf's Messenger must be on the battlefield. Geralf's Messenger does not have a +1/+1 counter on it. Mana needed:

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