A question, inspired by a dinner mint

If a mysterious fellow approached you, and told you that he could give you the ability to make your saliva taste like wintergreen, and only when and for as long as you want, and the only contingency was that you could never obtain any other magical power for as long as you lived, would you take it?

Here are my thoughts:
This is obviously not a great magical power, but it would be nice. You know, you'd always have fresh breath and an acceptable flavor in your mouth, and you'd have complete control. The issue for me is the fact that this scenario would introduce to you the possibility of having magical powers. Now aware of the real possibility (or is it real? you wouldn't know for sure until you accepted the dude's offer, would you?), would you jeopardize your (now seemingly real) chances at getting a high-quality magical power like, say, invisibility or flying or superhuman strength or mind control or lobster claw hands, just to have this unimpressive by comparison power? You couldn't, of course, be sure that you would ever have the opportunity for one of the sexier powers, and on-demand wintergreen flavored saliva might be quite pleasant.

But is minty-fresh breath really worth throwing away your potential to do something like this?