Dust Cave Dungeon
This dungeon is one of the most important that needs to be entered every day. You can farm in here the scroll you will need to upgrade your end-game accessories. The required level on this dungeon is Dragon Rank 5 and above and you will also need white crushers that you can obtain on the Dragon Rank monsters.
Step 1: Once you enter the dungeon, get the quest first.
Step 2: Find the right eggs which contain the monster "Garuda Frog". Here's the guide which contains the monster along the way.
Note: There are other eggs that contain "Garuda Frog". You will be needing 9 White Crushers on each egg.
Step 3: Kill "Ugly Parasit" at the early stage of the map.
Step 4: Kill "[Guard] Tree of Aldar" at the mid-stage of the map.
Step 5: Kill "[Guard] Baldo Lizard" at the near end of the map. Once you kill it, it will respawn another 4 Baldo Lizards that you need to kill to respawn the Final Boss "Retjack"
Step 6: Find the secret passageway near the Baldo Lizard location. You need to double-click the door to open it then submit your quest on the NPC. Once you submit the quest you will get 25pcs of Super scroll of AProtect.
Step 7: Kill "Retjack" (optional). This final boss drops the ultimate card piece & Dust Cave(Gold Key).
Other things to do inside the dungeon:
You can open the treasures around the Retjack area using your Dust Cave silver & gold key.