Da’Sth, the Green was the green Dragon known as The Mystic. She was originally given the Draconic Fiefdom of Finian, but was pleased to give it away to Yiteleph. Instead she wanted Nerthus’ Vale, which she sensed great power in. She spent most of her reign trying to isolate and extract the power hidden in and under the woods, but was unsuccessful. When Nerthus appeared and summoned the primal power of the Chosen from the forest, Da’Sth flew into a rage. She poisoned Lakdern and Goldern in her anger, slaughtering their population and destroying the natural beauty. Her rule stopped being one of pseudo-benevolent malice and she started acting like her kin, killing any public detractors and blaming Nerthus.
Da’Sth was one of the dragons who was sealed away in the earth instead of killed outright. She surrendered to the Chosen rather than suffer their wrath, being one of the few dragons aware of what they were capable of.