Well, you get another roll to break it every year on your birthday.  ("So when's your character's birthday, anyway?"  "Uh...tomorrow.")<br/><br/>But hey!  It's not<em>that</em>impossible to resist, and if you do (or break it later) then the caster can never do it to you again.  And then he's down 2 WP and a lot of motes, and you get to cut him.