Heroes start with a Power level of zero, and can gain 1, 2, and 3 Power levels through Ascension by spending Stars at levels 10, 30, and 60. Stars can be earned by opening Chests. Hero Rarity and Power level determine the cost in Stars to Ascend:
| Hero Rarity | Stars to Ascend to Power 1 | Stars to Ascend to Power 2 | Stars to Ascend to Power 3 |
| Common | 10 | 35 | 70 |
| Uncommon | 25 | 70 | 140 |
| Rare | 35 | 105 | 210 |
| Epic | 45 | 140 | 285 |
| Legendary | 60 | 175 | 355 |
Every Hero gains a new Perk with every Ascension!
Additionally, Heroes are awarded a special Melee Weapon, Backpack, and Headgear at Power 1, 2, and 3:
