Don't get too excited. Questlines are still a thing. Until they get addressed what's the point?
The "perfect world" solution is to print a card that says "Battlecry: Destroy the Enemy's quest or questline spell",
The "I'll settle for" solution would be to print a card that says "Battlecry: RETURN the enemy's quest or questline spell to their hand" and the rule would be once it's returned to hand the quest resets back to the start.
But hey, the balance teams being what they are I doubt they'll be addressed at all.
This dumb idea of a tech card is regurgitated so often on these forums that it makes me chuckle a bit more every time.
i understand the butt hurt of losing to some quests but please dont suggest idiotic ideas like destory the enemy quest, thank god u dont work at a balancing team.
I guess everyone just conveniently forgets Oh My Yogg! is a thing and unless your opponent knows its that specific secret and burn the coin first, there is plenty of GOTCHA moments in hearthstone clip compilations.