Talk:Nightmare Rift/@comment-120.168.1.245-20150201065411/@comment-25536475-20150202161747

So, an Overseer (boss) will appear at random times - typically on an hour (e.g. 8:00, 9:00, 11:00 etc) and will stay there for a certain amount of time. When an Overseer is out, you can challenge them by clicking "Challenge Overseer". You will then be given at least 3 quests (depending on how many Overseer is out at that time) which will give you Spirit Points. In order to receive an Overseer unit, you will need to accumulate a certain amount of Spirit Points. The harder the quest you do, the more Spirit Points you earn.