You must wish something, however, you must first grant the wish of the penguin before you and make sure to corrupt that wish.
Penguin A: I wish I owned a castle!
Penguin B: Granted! however, only your toy barbie can fit in it.
Penguin B: I wish I was an OP martial arts expert.
Example over, my turn now:
Granted! however every time you use your skill you get sick and sleep in bed for 50 days.
I wish I could check the future to see what my exam questions will be.