[ Hero ] Upgrade
1 Upgrading Heroes
◆ Improve your Heroes by Upgrading them. You can Upgrade your Heroes to greatly increase their stats.
◆ All your Heroes can be Upgraded up to level 5. Remember, you can't sacrifice Heroes assigned to your Party.
2 Sacrificing your Heroes
◆ You need to sacrifice other Heroes to Upgrade a Hero.
The ★ of the sacrificed Hero or Hero Token must be identical or lower than the Hero to be Upgraded.
◆ Note that Upgrades can fail consuming the sacrifices in vain.
You can improve your success rate by sacrificing more and better Heroes or Hero Tokens.
◆ Sacrificing a Hero or Hero Token of the same rank as the Hero being Upgraded guarantees a 100% success rate.
3 How to Upgrade
◆ For each Hero Upgrade, up to 5 Heroes or Hero Tokens can be sacrificed.
Add more and better Heroes or Tokens to improve your odds.
◆ Select the Heroes to sacrifice and tap on [Upgrade] button.
◆ Every time your Hero Upgrade fails, a bonus success rate will get stacked.
The stacked bonus rates will not be reset until your next Upgrade's success.