Items have their Upgrade Level increase through a process called Enchanting. Enchanting is a way to improve items of rarity Powerful or better. It is one of the main gold sinks in the game and has been changed to help reflect the state of the economy. This information is taken from in game calculations as of 22/10/2015.
The number of times an Item can be upgraded is limited by the Max Upgrade Items seen at the bottom of the item description between Sell Value and Required Level. This max upgrade level appears to be limited by item level giving a theoretical maximum of 50.
Formulas for enchanting: These formulas were calculated 22/10/2015.
Data for below calculations
Item fusion Power required.
The fusion power required per level is dependent on the current upgrade level and the rarity by following formula:
FusionPower = UpgradeLevel * (ItemRarity * 4)
TotalFusionPower = UpgradeLevel*(Upgradelevel+1)/2 * (ItemRarity * 4)
(note: Item rarity starts from Worn = 1 So Powerful : 3 Rare : 4 Mythical : 5 Legendary : 6 )
Examples: The fusion power to level a Legendary from upgrade level 3 to 4 is:
FusionPower = UpgradeLevel * (ItemRarity * 4) = 3 * (6*4) = 72
TotalFusionPower = UpgradeLevel*(Upgradelevel+1)/2 = 3 * 4/2 *(6*4) = 72* (4/2) = 144
Gold Cost: The gold cost of upgrading an item is dependent on the current upgrade level, the rarity and the number of items being fused.
Powerful : 9 Rare : 13 Mythical : 16 Legendary : 19
Item upgrade boosters
Some items can be used with the enchantress to boost the amount of fusion power gained. Please note that the following fusion power values were obtained by fusing with legendary items; it is expected that these numbers are static but this has not been verified.
|Item Name||Source||Fusion Power Gained||Gold cost at upgrade level 1|
|Small Item Upgrade Booster||2812||250|
|Item Upgrade Booster||5635||500|
|Large Item Upgrade Booster||Unknown||Unknown|