Onaga's Heart also called Heart of Onaga, also known as the Dragon King's Heart or Heart of the Dragon King, is an enchanted heart organ belonged to the legendary Dragon King of Outworld himself, Onaga. This heart, and so too Onaga himself, possesses the power to raise the dead. It made its debut and first appearance being mentioned in the endings of Havik and Kabal in Mortal Kombat: Deception. It is the true source of power behind Onaga's undefeatable army. For unknown reasons, his heart is what allowed Onaga to constantly resurrect his armies during battle.