Unfinishable quest

Carbonised

Picked up the new mage guild daily, find the mad gods button from obsidian scar in Rivenspire. Problem is there is no quest marker and absolutely no info as to how or where to find this item, you just run around aimlessly in the dungeon and are never able to find the quest item. Had to abandon the quest.

I believe lacking quest markers for new quests was already mentioned on the PTS, and apparently you didn't listen ...