You carefully break the cookie, eat it and find a small note inside saying:

You feel that Ggr is satiated.
You can't possibly eat more. You discard rest of the food.
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"Do not meddle in the affairs of wizards, for you are crunchy and good
with ketchup."
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You have an uneasy feeling after eating a magical fortune cookie...

Suddenly you are engulfed in a blue, shimmering field of magic, which 
dissipates after few seconds in a blink of bright light.

Another fortune cookie magically appears from thin air!