concept: cursed amulet that convinces the wearer there is no way it could possibly be cursed, and makes them completely resistant to any attempts to convince them otherwise
to clarify further: that’s it. that’s the entire curse. it has no other effects on the wearer, malevolent or otherwise.
them: yo you should take that necklace off it’s definitely cursed dude
me: hahah no way bro that’s crazy. like, that’s totally bogus, dude.
okay but to be fair, the one ring had many other curses as well