This elegant loop centers on the graveyard resilience granted by the Isilu, Carrier of Twilight side of Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, which gives Triskelavus the persist ability so it keeps coming back with a -1/-1 counter. However, because Bartolomé del Presidio is right there ready to sacrifice Triskelavus at a moment's notice, you can continually feed the cycle while growing your vampire into a massive threat. The clever twist is that Triskelavus can also spend its own built-in counters to spawn tokens, utilizing its inner mechanics alongside the sacrifice outlet to churn out boundless deaths and enter-the-battlefield triggers.