Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Woe Strider + Vorapede

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

Woe Strider

Vorapede

How it works

1. Activate Woe Strider by sacrificing Vorapede
2. When Vorapede dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
3. Activate Woe Strider by sacrificing Vorapede
4. When Vorapede dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
5. Resolve both Woe Strider abilities from step 1 and 3.
6. Repeat.

This intricate loop relies entirely on the dual nature of Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight; its back face grants persist to your other nontoken creatures, which elegantly plays against Vorapede and its native undying ability. By feeding Vorapede to Woe Strider's sacrifice ability, you can alternate between triggering undying and persist as counters cancel each other out upon return, generating an endless cascade of sacrifices and scrys.