Each trigram piece belongs to a set. Collecting and equipping every piece in a set will unlock further stats and even cause a physical appearance change on your character, making him or her blade and soul gold glow. Glowing effects vary depending on the rarity of the trigram set. Each set contains roughly three stat bonuses. Collect and equip three pieces in a set to unlock the first, collect five to unlock the second, and collect all eight to unlock the final bonus. This leaves room to mismatch sets if blade & soul gold feel the eight piece bonus isn't worth it. For instance, you can collect five pieces of one set and three of another.
You can tell the level of a trigram by its color.
White=Normal
Green=Senior
Blue=Top
Purple=Hero
There are five ways to get trigram:
1. Spin Loot Wheel by getting orbs from blade soul gold a boss monster in the wild
2. Drop from a normal monster
3. Doing quests
4. Exchanged by Hero Cards