The Crypt and the Three Dragons

In the crypt, Brother Oils (holding the tablet upside down and claiming to remember the texts "from seminary") convinced the last white dragonborn that he was a priest and talked him into killing himself. Then the party fought three dragons: Cometseed the gem dragon, Mireborne the black and The Rime Lord the white. Rainclaw died twice and Uldrick once; Oils brought each back through the Star Dancer, and brought down the black dragon, Mireborne, "with a finger and a prayer".