Board Thread:Questions and Answers/@comment-24749544-20140904095436/@comment-6697950-20140904134133

There are several types of quests. Some quests are unique and can only be completed by a single player (e.g. the Caliber quest in ALO). Other quests reappear periodically (e.g. ogre slaughter quest on the 30th floor). Some quests are instanced (e.g. floor 3-10 campaign quest). For more information, I recommend reading our Quest article.

And as for the Pneuma flower, I don't think that that's even a quest.