To help you find what you're looking for, could you please provide some more context?
For example, do you remember:
* What the spell was supposed to do? Was it about creating peace, resolving conflict, or something else entirely?
* What ingredients were used?
* What the incantation was?
* What episode or season did you see it in?
With more information, I might be able to help you find the spell you're thinking of.