This clever loop turns Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight into an engine of continuous rebirth by granting your other creatures persist, which Isilu provides on its reverse face. When you sacrifice Maulfist Squad to Woe Strider's sacrifice ability, persist brings it right back with a -1/-1 counter; thankfully, Maulfist Squad's fabricate 1 ability immediately places a +1/+1 counter upon re-entry, allowing state-based actions to cancel out both counters and leave the Squad ready to be sacrificed all over again. Woe Strider even rewards your endless cycle by letting you scry 1 with every single iteration, smoothing out your draws while churning through your deck.