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. Young Wolf must be on the battlefield. Young Wolf does not have a +1/+1 counter on it. Mana needed:

Steps

1. Activate Ashnod's Altar by sacrificing Young Wolf, adding .
2. When Young Wolf dies, its undying ability and Sengir's first ability trigger.
3. Resolve the Young Wolf 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 Young Wolf.
6. Holding priority, activate Ashnod's Altar by sacrificing Young Wolf, adding .
7. Repeat steps 2-4 one additional time.
8. Activate Ashnod's Altar by sacrificing Young Wolf, adding .
9. Resolve Tayam's ability from step 5, causing you to mill three cards and returning Young Wolf from your graveyard to the battlefield.
10. Repeat.

Results