This clever loop turns Woe Strider into an endless engine for sacrificing creatures and scouring your library with its scry ability. The true magic of the engine relies on Essence of the Wild to ensure that every replacement token entering the battlefield immediately transforms into a fresh copy of Essence of the Wild itself. Meanwhile, Requiem Angel watches over the carnage, manufacturing a replacement 1/1 Spirit token each time one of those copies hits the graveyard—which, thanks to Essence of the Wild, is never a Spirit, thereby keeping the loop fueled indefinitely.