Arcane Enhancement

Arcane Enhancements are special items that are rewarded for completing an 8-Player Trial mission. These enhancements can be applied to any Warframe Helmet or Syandana, and provide buffs that can be activated by achieving certain conditions within a mission.

Application
Arcane Enhancements are applied to an item by using an Arcane blueprint, whose components require both the Helmet or Syandana to be enhanced, and the Arcane Enhancement. The Arcane blueprint can be reused.

You cannot apply an Arcane Enhancement to Arcane Helmets.

Ranking Up
Arcane effects can be reapplied to increase in power up to four times the base value. Each application takes an additional Arcane and they must all be of the same type. Ten Arcanes are required to reach rank 3. Using a different Arcane type will overwrite the old effect with the new effect at rank 0.

Total price for reaching rank 3 is 800,000 credits. You need to craft it only 4 times.

Rarity
The Law of Retribution trial rewards some of the Arcanes much more frequently than others. ,, and  (and others?) are known to be very common.

Most of the others are individually very rare, making them difficult to assemble 10 copies of for the full effect.

Rarity is indicated by the number of connectors on the bottom and the number of chevrons on the top of the inventory icon.

Arkana Aufwertung Мистическое улучшение