To access ZG, you need to go to the swamp of sorrows and kill the avatar of hakkar, to kill him, you need to collect idols from the snakes inside the temple, they are at the beginning of the sunken temple. Once you reach 5 stacks of curse, you use an item and it deletes the curses. You will need about 2-3 to do that.
Druid is a pain in the ass, I got her at like 20th try, but doable.
Hope this helped.