Some spells, such as the Stun Club (Owl Magic), give you a chance to stun a monster. 


When a monster is Stunned, a ring of stars and a stun countdown appear above its head.


To complete the challenge that asks you to "Use your Wand on a Stunned monster", you have to use your Wand on a monster WHILE it is still stunned.


Note: If the monster is no longer stunned while you use the wand on it, then it WON'T count for the challenge.

Learn more about: Challenge - Defeat X Stunned monsters