Tayam, Luminous Enigma, Sengir, the Dark Baron, Ashnod's Altar, and Wingrattle Scarecrow

Prerequisites

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

Steps

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

Results

• Infinite +1/+1 counters on Sengir
• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• 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