In all honesty the player doesn't know it's coming, as always I'm planning ahead. Next session is Sunday, but I don't want to perma-nerf the character (other bad choices have led to as loss of options). I like the idea of using it as an RP hook. The lines of the curse were something like 'By striking me, you're striking yourself' (Obi-wan esque) I was adlibbing as I was on the backfoot as had lots of mystery solving planned.