Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Viscera Seer + Sightless Ghoul

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

Viscera Seer

Sightless Ghoul

How it works

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