Seems like a fun, crazy effect :)

Um. Ok, so I take the next turn; but my opponent gets it. Then that turn ends, and it would be their turn, but instead, it's mine. That turn ends, and... it's my turn.

So "Take an extra turn, at the end of opponents next turn"?

Well, no, that's not quite what the card says. It's still your extra turn, but your opponent CONTROLS it, as in Mindslaver. He gets to see your hand, cast any spells from it he wants, tell you what creatures will attack, etc. Then, you get to do the same with his next turn. After that, the game goes back to normal with you getting the next turn.

Plus a random pair of symmetrical Mindslaver effects thrown in for the fun of it.

I actually think symmetrical Mindslaver effects are a really good idea. Because you can build your deck to be quite hard to harm your own board position. Whereas anyone with, say, a Bloodthrone Vampire, let alone a Putrid Imp or a Zuran Orb... :)

Yeah, I think it's kind of a neat idea :)

Changed it back to its original version since it's much cleaner and this is just a concept card anyway - the time walk effect was put in there to make it a little bit more playable, but it works just fine as a Timmy card without that extra clause.