You shall be transported to a fictional world to live in for the rest of your life, or until the end of that world. You will remain human (no turning into Gandalf or dragons), but if that world permits it you may be able to attain or otherwise any powers that as realistically as said world permits. You will also be subjected to the laws of that universe, be they legal decrees by the Powers that Be or how physics works in that world (if the elves have banned humans from their empire, you are henceforth banned from their empire and risk whatever consequences there may be if you attempt to go to elf land. If gravity does not kill people in the Dark Souls universe, you will not die from two hundred foot fall... not that you'd want to live in the 'Souls world anyways). Choose.
While doing so, you may also wish to state what you wish to do with your life in that world, and any apprehensions or concerns you have about living there.