Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Phyrexian Altar + Weaponcraft Enthusiast

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

Phyrexian Altar

Weaponcraft Enthusiast

How it works

1. Activate Phyrexian Altar by sacrificing Weaponcraft Enthusiast.
2. When Weaponcraft Enthusiast dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When Weaponcraft Enthusiast enters, its fabricate ability triggers, putting a +1/+1 counter on it.
4. Repeat.