Here is our BT+ guide (left) on what you need to take your BT game to he next level!
Thank you y0shimuRa#1774 for making this document (right) on BT Books and where to find them and allowing us to host it on the site!
Note: Starting Act 3 Chapter 8 Part 1, Lufenia+ as a difficulty is no longer released. To get BT Ingots you must clear Lufenia fights with 3 synergy characters with no friend unit!
Update: As of March 2023, new BT tokens will come from designated events in batches of 10. In addition, expect to green 2 units per monthly cycle.