"...and thus it was said that Adaleer the Blest could reflect the true nature of any soul. Now some of his followers believed that his ranger gear, as much a part of him as his faith, was also so blest."
- Dauneth, Lore Chronicles
Magic should have side effects, both expected and unexpected - fortuitous and deplorable. Expected side effects add anticipation, while unexpected ones increase the drama of the scene. The result can be comedic or dire, it dpends on which circumstances work best for your game.