To rank up your heroes you need to look in the Heroes section, where you'll find a “Rank Up” tab.
To rank up, you simply need to have enough duplicates of that Hero, or Heroes from the same faction. Each time you rank up a Hero, you'll increase their rarity and make them stronger.
Do remember that in order to be able to rank up a Hero, that Hero must not currently be fighting in GDA Ops.
The requirements for ranking up a Hero as follows:
- From Rare to Rare +: 2 Rare duplicates.
- From Rare + to Elite: 2 Rare + factions.
- From Elite to Elite +: 1 Elite duplicate.
- From Elite + to Exceptional: 2 Elite + factions.
- From Exceptional to Exceptional +: 1 Exceptional duplicate.
- From Exceptional + to Epic: 2 Elite + factions.
- From Epic to Epic +: 1 Exceptional + duplicate.
- From Epic to Epic + (Levels 2 to 5): 1 Elite + duplicate.
- From Epic + (Level 5) to Legendary: 2 Exceptional + factions.
- From Legendary to Legendary +: 1 Exceptional + duplicate.
- From Legendary to Legendary + (Levels 2 to 5): 1 Elite + duplicate.
- From Legendary + (Level 5) to Seismic: 2 Exceptional + factions.
- From Seismic to Seismic +: 1 Exceptional + duplicate.
- From Seismic + to Seismic + (Levels 2 to 5): 1 Elite + duplicate.
- From Seismic + (Level 5) to Omnipotent: 2 Exceptional + factions.
- From Omnipotent to Omnipotent +: 1 Exceptional + duplicate.