This makes me super sad.
The control somebody's turn effect is so cool. Everyone wants it to be ok, man.
MtG first did it with Mindslaver, which they had to ban (oddly, though, it didn't really have much to do with what you could do with your opponent's turn, the problem was that people were having their opponent's turn be do nothing, and had a way to play Mindslaver every turn, since it's not an -extra- turn like Possession.)
They did it again with Sorin Markov, as his ultimate, so the card didn't always do the thing. Sorin Markov has never touched a tournament table due to low power level. But it was like, hey, we did it though, it wasn't too powerful, obviously.
Most recently, just a little over a year ago, Emrakul, the Promised End came out, which gave the opponent an extra turn instead of controlling the turn they were supposed to have. Unfortunately it was super important to the story, and was supposed to bring doomsday, and it was really important that every single number on the card be 13. But really if you playtested the thing and gave it unbiased development, it would have either come out to 15/15/15 or 13 on the bad number, the cost, lower numbers on the other good numbers, the ones that say how fat she is.
I bought 60$ worth of Emrakul, they went up to like 80, but then later, they had to ban her.
Now Donald is banning Possession.
When will I ever get to control somebody's turn.
You can control my turn too, it's ok. I just want us to have some philosophical questions about identity and some fun.