Bind a restless spirit into service: one of your captured knights or bishops claws back onto an empty square of your back rank and fights for 5 of your turns, then crumbles to dust, once.
You draft Undying Thrall in Buff mode. Activated: you choose when to use it, and using it is your move for that turn.
As a pieces card, it summons, revives, promotes, or converts a piece.
“It does not remember dying, only serving.”