The Guardian's Heart is a coveted Key Item in Remnant: From The Ashes that multiple characters demand from the player, and the Guardian this heart belongs to, otherwise known as Ixillis, is the only thing stopping the Root from invading the world of Corsus. Obtaining it from Ixillis is tough in and of itself, as most things in Soulslike games are, and the choice of who to give the heart to is equally as difficult. Both characters that want it, after all, hold a lot of power and offer tantalizing rewards.