I play Questline Priest, I know it’s not OP but that’s not the point. Just having a card that instantly wins the game isn’t fun, it’s physically draining seeing an opposing Priest play that quest turn 1 and even more exhausting when I see them have perfect curve.
Yes, it’s fun to pull off and has viable weaknesses with it taking at least 10 turns to play the spell if you have the perfect game, but the fact that it literally just says ‘destroy the enemy hero’ is the problem.
Mecha’Thun exists, having very specific conditions to pull off, but it also came with similar issues with it being a ‘win the game’ effect; it’s not really something that should exist really.
I doubt it’d ever be changed, but I just personally disagree with the existence of ‘win the game’ cards since Priest deserves proper win conditions with cards that actually work towards it like every other class, and not be tossed this boring win condition that makes the class very linear. Priest deserves better.