In RPG Maker MV (And perhaps earlier engines, I don't really know), a common premade state that you can come across is 'Immortal', which offers complete nullification of the 'Knockout' state (I.E. Death.) I am not a particularly creative person, so normally I never use it, and have only ever used it once, only to be confused when a character that had it didn't die. This pre-made state, like most skills, animations, etc. provided in the engine(s) is a tool much like anything else, so I have to ask, have you ever used it, and what did you use it for?