Because I have seen people done defense quests, just not sure how they got the quest in the first place. According to the following link, I'm suppose to get the quest from the sneaky thief in the Moon Village... but it's not there for me.
Link: http://ggftw.com/for...uests-list.html
[28] Artis' Treasure
NPC & Location: <Sneaky Thief> || Mirinae Sanctuary
Rewards: 183150 exp, 8 silver 12 copper
- Talk to <Sneaky Thief>.
- Clear Mirinae Sanctuary Hero Mode MM .
- Talk to <Sneaky Thief> to complete the quest.