Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Altar of Dementia + Marionette Master

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

Altar of Dementia

Marionette Master

How it works

1. Activate Altar of Dementia by sacrificing Marionette Master.
2. When Marionette Master dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When Marionette Master enters, its fabricate ability triggers, putting a +1/+1 counter on it.
4. Resolve the Altar of Dementia ability.
5. Repeat.

This clever loop turns Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight's back-face persist-granting static ability into a lethal engine by cycling Marionette Master through the graveyard over and over. When Marionette Master is sacrificed to Altar of Dementia, its persist ability brings it right back with a -1/-1 counter, which is immediately canceled out by the +1/+1 counter from its fabricate ability upon re-entry. Because Altar of Dementia mills your opponent each time and Marionette Master drains them whenever an artifact hits the graveyard, this repeating cycle grinds through their library and life total simultaneously.