There are very few things Riddick wants more than sleep right now. Jack offers him one of them. (Set immediately after the ending of Pitch Black.)
What would you do if you could have your enemy just magically appear right where you wanted them?
If ‘for every action, there is an equal and opposite reaction’ were partially applied to magic….
HP/Ranma xover. Harry and Ranma have both had crappy lives. See them turn it around, and give it back..in spades.
Deatheaters and more attack the Weasley-Delacour wedding, where Harry is laid out, hit by nine killing curses. The result is not a dead Harry, but a Harry whose magic has been purged of its imp...
When would be the best point in time for an over-powered Harry to return to his past? Right before the First Task!
The Heir of the Founders, the Heir of Merlin, needs to set the future straight -- by going back to 1971.