DISCLAIMER: Always keep empty space in your inventory at all times, especially when you're about to receive an item, and make sure that you are not overweight. The ExperienceRO team will not be held responsible for any losses due to users' own actions. It is players' responsibility to read the Rules and Regulations and the Warnings.
Cobalt Mineral is a normal monster that is best known in ExperienceRO for dropping Elemental Sword (100.00%). Only guilds that own the Schwartzvald Guild Dungeon can access its map. However, Cobalt Mineral can also be summoned by Dead Branch.
Note: Cobalt Mineral only has a card in renewal servers. As ExperiencerRO is pre-renewal, the card does not exist. However, you can view the renewal card here.