This elegant little engine transforms a simple sacrifice loop into an endless cycle of rebirth, fueled by the clever painting of Darkest Hour. Because Darkest Hour turns every creature on the board black, every single Spirit token created by Teysa, Orzhov Scion enters as a valid, black fuel source for Bartolomé del Presidio. You simply use Bartolomé del Presidio to sacrifice the newly minted Spirit, which immediately triggers Teysa, Orzhov Scion to replace it with a fresh 1/1 token. This loop can also support Teysa, Orzhov Scion's first ability to exile any creature on the battlefield by sacrificing three white creatures on demand, making this a versatile and terrifying machine in Commander, Legacy, Oathbreaker, and Vintage.