Rings are used, along with coins, to learn Skills in the Skill Tree.
- Kills in Castle
- Summon Gates (including Banner Summons)
- If you obtain a shard of a hero you have at 5 stars, it will convert to 5 rings
- It is possible to reset the skill tree and recover the rings for 100 gems
Note: Please let me know if I’ve missed any uses / earning options