Mergandevinasander

Mergandevinasander is a Black dragon that resides on the Island of Chult. He is said to have lavender eyes and was used as a ruse to fool Hephaestus into believing that Drizzt Do'Urden was him, as he and the Weeping Friars were trapped in his cave, and his, Drizzt's, plan was working until Hephaestus opened his eyes to see the friars running to the exit.