Elyssendril Lademmdrith
Elyssendril Lademmdrith was an Elven priestess from Argoth in the time of the Thran on Dominaria.[1]
During his exile, Yawgmoth turned the Creeping Mold of Argoth into a virulent plague that ate away the elves there. He also kidnapped Elyssendril Lademmdrith and her healers, ordering the elves to pay ransom for their leader and their cure. When the elves paid, he delivered to them only sweetened water and 12 dead healers.
Elyssendril survived and was later part of the delegates sent to Halcyon on behalf of the Thran Alliance against Yawgmoth.
Note
At the meeting in Halcyon, it was mentioned that she was of the Daelic elves and that she represented a vast confederation of woodland nations on the Domains. Since Argoth is not part of the Domains, this is a bit of a mystery.