Asking

[Ryu_evin]

use a bed (furniture) at your house or in your guild hall.
sleep on it and then click the attack button(it will be a hand symbol)
you will have 2 options. 'dream' or 'nightmare'. click 1st one. dream
clear whole map and boss spawns.
if u leave map after you enter then your daily which takes you to the map will be gone. so you have to try again the next day