Requires

Tayam, Luminous Enigma must be on the battlefield. Necrosynthesis must be on the battlefield. Ashnod's Altar must be on the battlefield. Rendclaw Trow must be on the battlefield. Necrosynthesis attached to Tayam. Rendclaw Trow does not have a -1/-1 counter on it. Mana needed:

Steps

1. Activate Ashnod's Altar by sacrificing Rendclaw Trow, adding .
2. When Rendclaw Trow dies, its persist ability and Necrosynthesis trigger.
3. Resolve the Rendclaw Trow trigger, returning it from your graveyard to the battlefield with a -1/-1 counter and a vigilance counter on it.
4. Resolve the Necrosynthesis trigger, putting a +1/+1 counter on Tayam.
5. Activate Tayam by paying , removing a +1/+1 counter from Tayam, and both counters from Rendclaw Trow.
6. Holding priority, activate Ashnod's Altar by sacrificing Rendclaw Trow, adding .
7. Repeat steps 2-4 one additional time.
8. Activate Ashnod's Altar by sacrificing Rendclaw Trow, adding .
9. Resolve Tayam's ability from step 5, causing you to mill three cards and returning Rendclaw Trow from your graveyard to the battlefield.
10. Repeat.

Results