Sorry if I wasn't clear about the Darkness and Holy Blade but my point was they cannot be used even if you have 200 mana. However, I remember that was the case before the test quest. Now that I've learned it again (I reloaded the save and left those two in the inventory), it seems to work now, I don't have a old save to go back to before the test quest, but I could be wrong but I was sure during that time, I had about 300 to 400 mana and couldn't use it.
Also one minor bug, there's a tree next to the shady guy who sells you a lot of secret goods right outside the dungeon guild area to the left. The upper right side of the tree's shadow is messed up. There looks like a debris/leaves or something there but the shadow is missing for that tile, makes it look out of place.
As for Mellissa (Priest's Daughter). The quest did continue. This was referring to it. I'm not talking about the first time in the beginning of the game that she joined you for a fixed amount of time (where she is following you and was in your party). I'm talking about after she was found per Priest's request after you passed the test and after Hero talked to her and agree to train her. She then disappeared (I thought she joined the party but she wasn't there). From this point all, she's gone and she doesn't exist anyway. It's been hours of fighting monsters in the west and east of the village and many dungeon runs on Floor 1 and 2. I'm just curious if this is a bug as she can't be found anymore. Was I suppose to go to a specific place to train?