 While wearing the slender rope as a tie, Nicodemus is invulnerable to attack even by Denarian standards, utterly immune to all methods of death except strangulation with the rope itself.In "Death Masks", Harry's realization of this allows him to survive, and in "Small Favor" Harry chokes him into unconsciousness and continues to hold on, intending to kill Nicodemus, but is interrupted by Deirdre before he can be sure of success.Harry then throws him over the side of a boat and into a lake, where he is swiftly retrieved by his daughter.