Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Phyrexian Altar + Pyreheart Wolf

Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight

Phyrexian Altar

Pyreheart Wolf

How it works

1. Activate Phyrexian Altar by sacrificing Pyreheart Wolf
2. When Pyreheart Wolf dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
3. Activate Phyrexian Altar by sacrificing Pyreheart Wolf
4. When Pyreheart Wolf dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
5. Pyreheart Wolf enters and dies as a state-based action due to having 0 toughness. Its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
6. Repeat from step 3.