Tidāhi, the Platinum Dragon, is said to be one of the first three dragons alongside Tiamat and Theratis. He is said to be the first metallic dragon, purely good in his existence.
He disappeared at the end of the first era during the Omniborn Crisis, after the death of Tiamat. Some think that he was killed by Khaz Draxal, while some believe that Tiamat and Tidāhi were linked and the death of one caused the death of the other. Although, if Theratis and some dragonborn elders are to be believed, "Tidāhi's work is simply completed," and to look out admist the sea of humans for "peculiar old men".
Followers of Tidāhi are rare on Abmarah by the third era, with only the oldest of dragons remembering their fallen god. That being said, many Dragonborn still venerate him as part of their customs. He is also customary worshiped by Môrists as a part of their ritual practice venerating fallen deities.