Some high levelled monsters and bosses (eg. Nomad, Bork, Jade vine) cannot be harmed by deflect curses and the player will get a message "You are unable to reflect damage back to this creature."
Some high levelled monsters and bosses (eg. Nomad, Bork, Jade vine) cannot be harmed by deflect curses and the player will get a message "You are unable to reflect damage back to this creature."