Cost - How much it costs to install this mod.Precepts - Behaviour schemes for Companions.Auras/Stances - Passive powers that raise your available mod points.Augment Mods - Alter the Ability / weapon behaviour, or add new functionalities.General Mods - Improve your weapon / Warframe / Sentinel.There are four different kinds of mods in Warframe: Warframe's Mod System is based on cards that can be found while you play the game.
