The Heart of Sardior is a legendary artifact, said to be the crystallized heart of the Ruby Dragon, Sardior.
According to myth, Sardior was the firstborn of Tiamat and Bahamut, brought into existence through the Song of Creation, a harmonious duet sung by these two dragon deities. When the First Material World, shaped by this divine melody, was destroyed, Sardior perished along with it. However, his heart remained—a fragment of unimaginable power and the spark that birthed a new world known as Terragon.
Legends say that the Heart of Sardior lies at the very center of Terragon, hidden in the deepest reaches of the seventh layer of the Underdark. It is said to pulse with psionic energy and serve as the source of magic and life for the entire world. Scholars and adventurers alike seek it, believing that it holds boundless knowledge and power.
Yet, the path to the Heart is perilous. The depths of the Underdark are home to ancient beings and arcane protections. Some whisper that Sardior’s spirit still watches over his heart, testing those who dare to approach.
Discovering and studying the Heart of Sardior may unveil the secrets of the Song of Creation, shedding light on the origins of Terragon and the mysteries of the draconic pantheon. But only the bravest—or the most reckless—would risk everything to claim it.
For more information about Sardior, check out the official lore: Sardior on D&D Wiki
For details on the Song of Creation, refer to this source: D&D Song of Creation