Players that are working on the Subterranean Trials of Drake and Serpent World Quest in Genshin Impact will eventually need to complete a series of subquests. One of those subquests is called The Heart Of Ouroboros, and it begins by sending fans to the Serpent's Heart. While visiting this location, Genshin Impact players will be instructed to solve the riddle at the altar in the Serpent's Heart, and this guide details exactly how that is done.