Old Daka is the eldest of the Nightsisters of Dathomir, appearing in "Massacre", the nineteenth episode of the fourth season of Star Wars: The Clone Wars (2012). She is the keeper of the clan's deepest magick, including the Chant of Resurrection — a working the material otherwise attributes only to Merrin.
When General Grievous's droid army lands on Dathomir, Daka raises the clan's dead to fight alongside the living, and the battle holds until she is killed and the risen fall with her. It is the single most striking image the series produced of Nightsister power, and it is deployed in the episode that ends the clan. Canon.
Catalogue entry. This figure has a verified record here rather than a full write-up — the encyclopedia labels its own depth instead of padding it.