Little is known about Guildmaster Brackett, save that he seems to be the leader of the Society of the Black Lotus and that he is a powerful wizard (evidenced by his appearance in a meeting in Sigil with Raven DuBois in Astral Projection form).(The story so far)

The Planeswalkers met Brackett again, in astrally projected form, when they breached the manor house of the Gray Orb in Torch. They found him talking with the leader of the Gray Orb.

Using a strange magical cube, the Guildmaster had opened a Gate to another plane, through which Black Lotus troops were leading a column of chained slaves. Before the Gray Orb leader could join them, however, he sealed the gate, denying his pawn any escape. (19)

Brackett's goals and ultimate ambition are still shrouded in mystery, but he is obviously a powerful and resourceful enemy.