Aura

Auras are special Mods. They operate as normal mods except that they affect teammates.

Using Aura cards will add to your total mod capacity, unlike regular mods. Forma can be applied to the special Aura slot the same way you would polarize any other slot.

Putting an Aura with the same polarity slot as your Aura slot will double the mod points given (point cost 5 Rifle Amp becomes 10 points added) and Auras of different polarity will decrease the amount of points you gain (minimum 1). A maximum of 28 bonus mod points can be acquired from a Steel Charge with a matching polarity, 14 points for no polarity, and 10 points for an unlike-polarity.

You can add an Aura mod to your Warframe regardless of its rank, including unranked. This can help greatly when using a new frame, allowing you to use powers or other mods right away.

There are currently 3, 3 , and 9 aura mods.

Acquisition
Auras are obtained as alert mission rewards. Aura cards can be sold for 500 credits at their base values.

Trivia

 * Aura Mod cards were converted from user's Artifacts as of Update 9, including more than one if the user obtained more than one before the update.
 * For a short time after Update 10.6 some auras (as well as some mods) could have been acquired via transmutation. This was due to a bug where all mods (including unreleased ones) became obtainable through transmutation. This has since been fixed, though some auras have been released. The list of these Auras can be found in Category:Retrieved Content.