Several synergies are too powerful.
Battlecry quest and lackeys.
Prisma and 7 murlocs.
Dr.Boom and mechs.
Conjure and giants.
Completely agree. And for some reason they intended these?? All of these pre-existing cards were good enough on their own to be played in certain decks, but they released new cards to make them completely broken. This is not the same as indirectly buffing bad cards. Lackey were pretty good already, so why make a quest where they are both the key to completing the quest easily, then the reward is you get twice as many and each of those is twice as effective?