Knights of Goldenhawk Tower
An archfey trapped in the form of a huge and ancient tree in the flying citadel of Spellhold. Its sap was being used in some sort of process by The Priests of Bane and The Cowled Wizards along with the arcane essence of The Emerald Cabal Wizards to strengthen and heal The Heart of Bane.
Shan Val conducted a ritual to free Yggdrasil from its enchanted prison. The tree cracked and apparently died in the process but a single seed floated down and landed on Shan Val somehow infusing with his body.