How Z-Director works?
Z-Director is a feature for the horde that can help the zombies turn the tides of the game. Because Z-Director is still new to the Zombie Survival. It's still being changed and will be constantly updated.
Z-Director, unlike Metagame, works differently. Instead of waiting for a great evil to spawn in. The game will take the data such as humans vs zombies ratio, damage output, etc and overtime, the Z-Director will increase the level up until 5 crosses.
After 5 crosses, if Z-Director's level does not go down for few minutes, Z-Director will activate zombies will receive Battlecry.