Cannot be traded
The density and solidity has been heightened by repeated experiments from Rune Midgard's scholars. It seems that it becomes more difficult for weapon upgrade.
When you fail while upgrading defense weapon whose upgrade level is over +10, it won't be destroyed.
(When the upgrade fails, upgrade level gets -1)

[iRO Description]
This item cannot be traded.

Midgardian scholars have continued to research, and the density and strength have increased. It seems that it has become more difficult to smelt weapons.
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You can refine level 1-4 weapons with a refinement level of +10 or higher.

(If the refinement fails, the refinement level decreases by 1.)
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