| Hero Soul Stones are used to evolve hero star rank, which increases main stats. There is a maximum of six stars. |
The number of required Soul Stones increases with each upgrade:
1st star — 10 Soul Stones;
2nd star — 20 Soul Stones (or 30 Soul Stones if you summon the
hero for the first time);
3rd star — 50 Soul Stones (or 80 Soul Stones if you summon the
hero for the first time);
4th star — 100 Soul Stones;
5th star — 150 Soul Stones;
6th star — 300 Soul Stones.
You can earn Soul Stones by:
- making summons at the Soul Atrium;
- completing special event tasks;
- purchasing a bundle with hero Soul Stones;
- buying in one of the game Shops.