She snorts at that, apparently very amused. "Yes, there are magical vows, no they are not binding. If you have a vow about something, it's basically an early warning system. If you say you have the vow, it flares so people know you are telling the truth and if you break your vow then both you and any others on the other end of the vow instantly know that you've broken your word." Now you have most of the meat off on a separate pile where she is slowly guiding you on how to cook it with your powers.