It is associated with the The League.
"Impurity" Rune. Symbol of the League oath.
- Boosts max HP during co-op +2%
- Wearing the Impurity Oath Rune aligns you with The League faction, and you will be able to see and find Vermin.
Equipping the Impurity rune allows players to summon special NPC Hunters which too are a part of The League and are connected in-lore, those Hunters are:
The summoning Messengers of these NPC Hunters are different in color. Whilst most have a pinkish red hue, the League Confederate Hunters have a blood red color to it. These Hunters will also spawn into the world performing the "League Oath" gesture and will have the title of "Confederate" as a prefix.
(Read the Old Hunter Bell page to learn which bossfights players can summon these League Confederates into)
- Players wearing the Impurity Oath Rune will be hostile towards other summons wearing conflicting Oath Runes, such as the Radiance Oath Rune, and the Hunter Oath Rune.
- The rune resembles a crucified human being bleeding from the wrists.