Un-Being's Touch (3.5e Invocation)

''While the Un-Beings are long gone, the shadow of the greatest of their number yet remains. Through her, you can draw upon some of their legendary destructive power, creating injuries that are very difficult to heal.''

If applied, this invocation causes anyone dealt damage by your abyssal blast (regardless of the option chosen) to make a Fort save. If this is failed, the damage dealt by the blast cannot be healed (by any means) unless the creature that attempts the healing (fast healing and natural healing are considered to come from the creature itself) succeeds on a level (or CR) check against a DC of 10 + your character level + your Charisma modifier. At the beginning of each affected creature's turn, that creature can attempt a new save, at the original DC, to end the condition for itself only.