This brilliant loop is built upon the back-and-forth between Woe Strider and Voracious Brood, fueled by the recursive engine provided by Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight. While Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight grants your nontoken creatures the life-saving grace of persist while in its Isilu, Carrier of Twilight state, Woe Strider acts as the ultimate sacrifice outlet to trigger that persist ability repeatedly. Each time Voracious Brood is sacrificed to the Goat-yielding horror, it returns with a -1/-1 counter—wait, thanks to Voracious Brood's own massive growth tracking and the interaction with persist, you get an endless cascade of dying, entering, and sacrificing. You'll churn through your deck with infinite scry triggers while piling up endless creature leaves-the-battlefield and death events to seal your victory!