There are few companions truer than a well-honed weapon. Treasure it.
― In-game description
Arc Infinite Edge is a Legendary Sword that can be obtained through the quest A Tale of Two Guardians.
Exploits[]
The guard function for this sword provides substantial damage resistance, capable of keeping a Guardian alive when Crota uses his Oversoul in the Crota's End Raid,[1] and Skolas's Devouring Essense in the Prison of Elders challenge Skolas's Revenge,[2] provided they are actively blocking.