Jo first officially took up her psychopomp's wand near the end of Act I of our 24th storyline, "A Long, Long Trail A-Winding," and for more about Tharka's past, try dipping into our 4th storyline, "Dust Bunny," our 11th storyline, "The Apprentice," and our 16th storyline, "Toil and Trouble." That'll getcha started, at least...
Thirty-Three - Against the Dying of the Light