To access the Upgrade screen, select the hero you wish to Upgrade from the Hero/Item screen. From there, select Upgrade on the right-hand side of the screen. You'll be presented with a selection of heroes to use as material on the right. You may use up to six heroes as material at once to Upgrade your chosen hero. Depending on the chosen hero, it costs a set amount of Gold per material chosen. Also, the grade and upgrade level of the material hero dictates the amount of points the chosen hero will be upgraded. Once you've chosen your materials, just hit the Upgrade button.
|Grade|| Points As|
| Points Required|
| Total Points|
| Cost Per|
Also, if a hero is equipped with anything when being used as Upgrade material, the equipped items will be lost.
Finally, there exist five heroes known as Red Hatzling, Green Hatzling, Blue Hatzling, Silver Hatzling, and Gold Hatzling. They are 1 through 5-Star heroes respectively and will provide triple the Upgrade experience for their grade when used as material.
Extreme UpgradeEditAs of a recent update, the method of Extreme Upgrading has become available as a means to surpass the +7 upgrade limit on 6-Star heroes. Extreme Upgrading works similar to a Combination, however there are different requirements.
To perform an Extreme Upgrade, the base hero needs to be of grade 6-Star, be at level 30, and have an upgrade level of +7, +8, or +9. Then it must be combined with a second copy of the base hero. However, level and upgrade level of the material hero is irrelevant. This results in an upgrade level +1 higher than before.
Usually, the level cap of a hero is level 30. However, a player may opt to Transcend a 6* or Awakened hero beyond that level cap. To do so, the player must posses an extra 6* copy of the hero in question. For instance, to Transcend Light Sword Sion or Awakened Sword Sion, a copy of Light Sword Sion must be used. By doing so, the level cap of the hero will be raised by two. This process can be done a total of five times, raising the maximum level cap to 40. The raised level cap of a 6* Hero carries over to the Awakened version of the Hero as well.