Tayam, Luminous Enigma + Necrosynthesis + Ashnod's Altar + Geralf's Messenger

Tayam, Luminous Enigma

Necrosynthesis

Ashnod's Altar

Geralf's Messenger

How it works

1. Activate Ashnod's Altar by sacrificing Geralf's Messenger, adding CC.
2. When Geralf's Messenger dies, its undying ability and Necrosynthesis 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 Necrosynthesis trigger, putting a +1/+1 counter on Tayam.
6. Activate Tayam by paying 3, removing a +1/+1 counter from Tayam, and both counters from Geralf's Messenger.
7. Holding priority, activate Ashnod's Altar by sacrificing Geralf's Messenger, adding CC.
8. Repeat steps 2-5 one additional time.
9. Activate Ashnod's Altar by sacrificing Geralf's Messenger, adding CC.
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.

This looping engine turns Geralf's Messenger into an immortal life-drain machine by constantly recycling it between the battlefield and the graveyard. Ashnod's Altar provides the colorless mana needed to fuel the loop while turning every sacrifice into profit, working hand-in-hand with Tayam, Luminous Enigma, whose ability fishes the Messenger right back out of the graveyard. Along the way, Tayam's passive vigilance counters and Necrosynthesis provide a steady supply of counters to pay for Tayam's activation costs, while Necrosynthesis also triggers whenever creatures die.