I was selling items during a boss fight. I clicked outside the quest window by accident and lost the quest. Now I can't get the quest again until I rebirth, which requires the demon lord's castle. Talk about punishing. There should be a retroactive way to accept quests instead of declining them forever. There's few enough in the game as it is. At the very least a faster way to rebirth would be nice. It's impossible to grind for rebirth points.