Velcuthimmorhar

Hephaestus is a dragon, or wyrm in the Forgotten Realms. He is presumably named after the Greek god of the same name. He appears in Servant of the Shard, encountered by Cadderly Bonaduce, Jarlaxle, Artemis Entreri, and Danica, the group who was to destroy Crenshinibon. When Crenshinibon is destroyed, a blast of energy is released that is so bright that Hephaestus is blinded. That blast also kills the cleric Rai-guy.