Faction Emblems are used to upgrade Signature Items from +20 to +30 (+40 for Celestial, Hypogean, & Dimensional heroes).
To upgrade a Signature item of a hero, only Facion Emblems from this hero faction can be used (e.g for upgrading your Shemira signature item from level 20 to 21, 10 Emblems of Death [Graveborn Emblems] are needed).
Faction Emblems are the rarest Emblems, and acquiring them will be harder than Primordial Emblems or Amplifying Emblems. The best source of Faction Emblems are Emblem Choice Chests, from which you can choose which emblems you want to obtain.
Emblem Choice Chests are mainly obtained from events. They can also be obtained from currently ongoing Tavern Bargains event (as an Emblem Choice Chests), Towers of Esperia quest from floors 200+, gift sets, and AFK Rewards starting from Chapter 19. They can be also bought from the Store for Diamonds (as Emblem Choice Chests or a chest with 20 random Faction Emblems for 3060 Diamonds).
|Levels 20 to 30|
|Levels 30 to 40 (Celestials, Hypogeans, & Dimensionals only)|