Infinite +1/+1 counters on a creatureInfinite colorless manaInfinite death triggersInfinite creature ETBInfinite creature LTBInfinite creature sacrifice triggersInfinite self-millPut a selection of permanant cards from your library and graveyard onto the battlefield
How it works
Activate Ashnod's Altar by sacrificing Wingrattle Scarecrow, adding CC.
When Wingrattle Scarecrow dies, its persist ability and Necrosynthesis trigger.
Resolve the Wingrattle Scarecrow trigger, returning it from your graveyard to the battlefield with a -1/-1 counter and a vigilance counter on it.
Resolve the Necrosynthesis trigger, putting a +1/+1 counter on Tayam.
Activate Tayam by paying 3, removing a +1/+1 counter from Tayam, and both counters from Wingrattle Scarecrow.
Holding priority, activate Ashnod's Altar by sacrificing Wingrattle Scarecrow, adding CC.
Repeat steps 2-4 one additional time.
Activate Ashnod's Altar by sacrificing Wingrattle Scarecrow, adding CC.
Resolve Tayam's ability from step 5, causing you to mill three cards and returning Wingrattle Scarecrow from your graveyard to the battlefield.