➕Upgradability

Domains are upgradeable to the next 'Element', by paying more $ORN equivalent to the cost of the next tier minus the current tier.

For Example, You forged a Stardust and wish to upgrade the Stardust to the next Element, which would be MoonRock: Cost Of Upgrade = Cost Of MoonRock - Cost Of Stardust Cost Of Upgrade = 6 ORN - 1 ORN = 5 ORN Hence, the cost of upgrade is the cost of the next tier minus the current tier