You can unlock a new quest (Quest 6) on the Town of Mitra. Visit THIS PAGE for Town of Mitra Guide.
NPC: Man inside the weapon shop
 Defeat 8 Bloody Eyes, you can find it on the Lechios Hills (I find them on Scamp’s Alley)
Reward: Recipe for Rune Staff
NPC: Shop Clerk inside the armor shop
 Obtain 5 Earth Megacryst
Reward: Paladin Armor (+32 Defense, +10 Spirit)
NPC: Old man inside the north west room
 Give 3 chromatic ooze, you can get it from yellow jelly or red marshmallow.
 Give 1 otherworldly Bone. You can get this from the werephanter on Lanzelt Highland.
 Now go to the boat shown on the map above (west of the item shop) to claim the reward.
Reward: Moon Ring Blade
NPC: Woman on the south west room
 Deliever Zadehl Ore. You can find Zadehl ore on the location shown on the map above. Simply walk a little bit more from the rock on the screenshot, you will see glowing thing on the sand. Pay attention because it’s easy to miss.
Reward: Recipe for Hypno Crown
Quest 5 – 11 Location are listed on screenshot below
NPC: Lady beside the farplane monument (Q5)
 You need to clear scaar man quest
 Find the girl on Wolfsfang peak. It’s located on the 2nd area of Wolfsfang Peak.
Reward: Kiku-Ichimonji (Katana +30 Atk)
NPC: Boy on Q6
 You can find the man on Lanzelt Highland, it’s the one area before the boss battle area.
Reward: Tiger Mask
NPC: Paper on the Q7
 Find 3 dragon scales (Wyvern; you can find it on Lanzelt Highland as a boss, you can fight 2 wyvern on the exploration as the boss)
 Find 3 elemental tears (Green wisp on Phantom Forest Drop this)
 After finding those things, go back to the town and then choose “report”. You will arrive on the Tavern, talk to the Tavernkeep to finish the quest.
Reward: Coral Sword
NPC: Man on Q8
Defeat 8 Hivesguard, I go to Lanzelt Lowlands – Cliffs (easier to find find hivesguard there)
Reward: Recipe for Ninja Gear
NPC: Crewman on Q9
 You can get Sleepweed on the Lanzelt Highland. It’s after you cross the wooden bridge.
 Report back to Crewman, and then go to Village of Kol. The grandma stands in front of the inn. Report back to Crewman.
Reward: Recipe for Sleep Dagger
NPC: Boy on Q10
 Find the doctor inside the house that shown on the screenshot above.
 Find 3 Abominable Wing, you can find it easily from poison eagle on the Lanzelt Highland
NPC: Barrel on the town, you won’t see the quest icon on your map. See the picture above for the location of the barrel
 Go to Zadehl Westersand, check the giant rock near the boss area.
 Return to Grandshelt Royale Capital Vault
Reward: None (you already get the Earth Key#20, right :)? )
1st locked chest: Inside the weapon shop, contain “Recipe for Brace”
2nd locked chest: See the map above, contain “Recipe for Barwatera”
I won’t list unimportant item such as potion, etc. They can be bough easily from the shop.
Recipe for Warhammer; just right on the entrance. Hidden by the inn signboard.
Scholar Robe; Inside the item shop (the one that near the inn).
Star Quartz; Southwest of the armor shop
Sage Surplice; near the abilities shop, you can see it easily, no hidden path or something like that.
Iron Mace; Go north from the farplane monument, you will also find ether along your way.
Chain Whip; South of the boy who gives you Quest 6. See the screenshot above to find it.
Recipe for Bacchus’s Wine: Airship Reception, behind the counter lady. Airship reception is a build that is in the middle of this town (large building) which have 2 doors separated by the river.
Star Quartz; see the map above T1, it’s hidden by the wall
Iron Shield; T2 on the map above
Earth Key #7: Go to the inn (the one that located on the south). You can use this to unlock Bio Blaster which is very useful against white dragon.