Corrupt a Wish
Granted. Too bad you didn't specify how much taller! You must be at least 20 feet tall.
I wish I could type faster.
Granted. Your smell drives away even your closest friends and family who can't abide your strong stench.
I wish I could play well whatever musical instrument I wanted to.
Granted! But it forgets who you are and attacks you.
I wish I had the Force...so I could get that cookie the Dark side stole.