Soulstones are items that are used for Reinforcing your Hero, as well as awakening them. Soulstones are important for strengthening your character to their maximum potential and they’re a rare item that must be accumulated over time.
Reinforcing heroes using Soulstones increases their skill level and stats. In turn, this makes them more powerful in combat since they will have better effects. For reinforcement, the soulstone that you have must be character specific.
Awakening a character is a final form of promotion where you get a new form, as well as increased stats. Not only do you need Soulstones of your character, you will also need soulstones of 3 more characters as listed.
You can get Soulstones from the following:
* Recruit characters that you already have. Any duplicates get converted to Soulstones instead.
* Check the Soulstone Shop
* Clear the Soul Dungeon