i was playing quest when i thought of something, what if zombies had their own set of quests and bosses
like quests disigned just for zombies with powers that could complete it. a quest could be for made for 1 or more zombie type, like there could be walls which the digger has to dig under in order to pass, there could be levers hight up which an only edgars can reach, there can also be targets which brutes have to throw its club to active it. the boss's hp can change to fit the zombie picked for the round[example: boss has 120k hp for brutes, and 20k hp for edgars] there can be edgars which can pin down the boss, and make it easier for the other zombies to do massive damage to it.