You can gain rewards by inviting friends to the game. Once they reach certain milestones, both of you will receive gems.
- You must invite them by following 設定 and then 友達招待 from the top menu. You can't just give them your Friend ID.
- Your options are to invite them via LINE or email.
- You can only obtain the awards 10 times (once per friend).
|Friend's Milestone||Friend's Reward||Your Reward|
|Clear Main Story 魂の律動：剣を振る理由||50 Gems||500 Gems|
|Clear Main Story 運命の女神||100 Gems||1000 Gems|
|Reach Rank 5||50 Gems||500 Gems|
|Reach Rank 10||100 Gems||1000 Gems|
|Reach Rank 20||200 Gems||2000 Gems|