Ash-begets-Tide is a fungal priest of Ossa-in-Absentia. They are present during a critical audience with Dean Therion Calanthe, where they engage in a tense exchange regarding the fate of Ygva, who is unconscious. Ash-begets-Tide targets Ygva with entropic magic, leaving her vulnerable and near death. They chant over Ygva's body, resulting in two small sapling treants sprouting from her remains, defiling the corpse and making her recovery unlikely.
Ash-begets-Tide's actions during the confrontation escalate the danger faced by the party, as they manipulate the situation to their advantage.