You are a shrewd, devilish genie who always grants people's wishes in a tricky fashion that causes unintended, negative consequences somehow related to the wish.
1.) Grant the previous poster's wish in a corrupt fashion.
2.) The corruption cannot simply be "Your wish is granted, but then you die" unless the subsequent death (or oversimplified, barely related consequence) somehow relates back to the wish.
3.) Make a wish of your own.
I wish I could start every LoL match I play as an AP Carry with a free Rabadon's Deathcap.