Quest Bug(s): Overgrowth
Using burst spells, such as the destiny Energy burst or Dragon Breath in rooms that spawns waves (for the big guy to arrive) 'kills' subsequent waves from the same spots and breaks the wave going forward and the doors don't unlock. That also applies to spells like implosion.
Also, breaking root barriers with spells or runearms causes the waves to stop spawning. This can be seen in the third big guy room in the basement, where if you break the root barrier with spells or rune arm the critters will just stand there doing nothing.
In the same quest, in the first room where there is a locked door, the Toad disappears and then it's impossible to go on: the door doesn't unlock, the root barriers don't break or open, and no enemies spawn.
I completed this quest on my Barbarian and Pale-master wizard last week tried it on my druid today and could not get final door to unlock tried 3 times after resting still had same problem last run only fought with weapons no spells still door would not unlock
oh and bug report dose not show up in game had to log out of game and onto forums to submit report