The Heart of the land is an amulet made by Kikimi and her spirit animal, a Gila monster. It is one of the four treasures of the past, and represents Amaya. It was found by the Four Fallen in Heart of the Land.
This amulet gives the wielder the power to make sinkholes, tunnels, and make a big invisible shield. It can also make small earthquakes, and possibly make the wielder's bite venomous. The Heart gives power to anyone, even those who do not have a spirit animal.
It is a small stone on a chain with the shape of a Gila monster inside the stone.