1) The Priest will have a dead card in his hand until 10th turn. So that might scare them away from putting 2 copies of it in the deck.
2) Priest won't be able to do anything else on the turn that MC is casted.
3) The opponent gets to use their fatties for 2 more turns than before, but this becomes invalid once players reach 10 mana.
but these things aside, the spell still provides a 2 for 1 trade. Especially in a topdecking situation (which isn't rare at all). Let's say the opponent draws and plays a Tazdingo, the Priest Mind Controls it and with the heal ability, Tazdingo won't easily die, now the Priest has an unstoppable momentum on his side.
I was talking about constructed but in arena, I'm pretty sure the 10 mana nerf isn't and won't be enough. Since topdecking is much more common than constructed.
Do you think it killed the card?
Do you think it was just the right nerf?
or do you think it isn't enough?