Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Viscera Seer + Nardole, Resourceful Cyborg

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

Viscera Seer

Nardole, Resourceful Cyborg

How it works

1. Activate Viscera Seer by sacrificing Nardole
2. When Nardole 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 Nardole
4. When Nardole 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.