I don’t know how they make cards like this, now its not just zarimi that kills u from hand turn 8, the new hunter copy card gives hunter 0 mana otk earlier than zarimi, I lost to this twice at turn 7 but I think with perfect draw you can play it even earlier.
imgur. com/a/ARXUozd
edit I went to do some testing and in bit slower matches you can EASILY pull 100dmg otks with 0 counterplay
Yeah, they made imbue hunter a lot more dangerous by letting them copy a 0 cost charging minion. Welcome to Hearthstone.