Evolution
To promote hero’s star level, the player need to appoint an hero and uses other 4 heroes of the same star level as the synthetic energy. The upgrade has a certain success rate.
If the upgrade is successful, a new magic box will be obtained, open it can get a higher star-level hero with random attributes.
If the upgrade fails, a new magic box will be obtained, open it can get a hero with the same star-level with random attributes;
Whether the upgrade is successful or failed, the 4 synthesized heroes will all be consumed as energy.
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