Arcane Guardian

is an Arcane Enhancement used to permanently alter a cosmetic Syandana or Helmet to become an provide an in-game bonus.

Effect
provides a chance whenever the player receives damage to increase the Warframe's armor for a short time.

Acquisition
Successfully completing the The Law of Retribution will award each member of the group a copy of the same random arcane. is a common arcane and will be found somewhat frequently.