Mods

Modules (Mods) (ver: 2.0) are cards that can be equipped to Warframes, weapons, sentinels, Kubrows, and Archwings to enhance damage, power, survivability, speed, precepts, and utility. Mods can grant Passive Powers, Active Powers, Sentinel Precepts, and Utilities. Mods can be changed between items. There are around  mods existing in the game.

Acquisition

 * Building or purchasing Warframes and companions will provide a mod for each of their unique 4 abilities(Warframe) or 2 precepts(companions).
 * Survival, Spy and Capture Missions offer a mod, blueprint, or credits as a mission reward on completion.
 * Every 5 waves of Defense missions will offer you a reward chosen randomly from a faction specific drop table.
 * Dispatching enemies.
 * Higher level enemies do not have a higher drop rate.
 * All mods picked up from enemy drops are the same for every player.
 * Every enemy type has its own small drop table of mods. This information can be found in the mods' pages.
 * Mods can be obtained from the Orokin Void canisters and more commonly from treasure room canisters.
 * All mods picked up from canisters are different for every player and disappear after a length of time. With Update 9.6, mods were said to never disappear as drops but canister mods will still disappear.
 * Mod Transmutation can fuse 4 selected unranked mods to create a random mod.
 * Some mods can only be obtained through completing special missions such as Alerts, Nightmare Mode and Orokin Derelict. More details can be found below.
 * Purchasing Mod Packs from the market.
 * Archwing mods are dropped in the Archwing missions.

Attributes
Mods have 9 attributes: (place on card)
 * 1) Mod Name: The name of the mod
 * 2) Capacity Drain & Polarity: The point cost that the mod will drain and the polarity of the mod
 * 3) Mod Rank: The upgrade level of the mod
 * 4) Mod Compatibility: What the mod can be equipped on
 * 5) Conclave Rating: Conclave value of the mod, used in PvP and Specters.
 * 6) Stack/Duplicate Count: How many of that mod you have of that mod rank
 * 7) Aura/Stance Indicator: Symbol denotes if the mod is used for an Aura or Stance
 * 8) Number Of Duplicates Selected: used when telling the user how many of that mod are being used in Fusion or for selling
 * 9) Rarity: Denotes how rare the card is, by what color the card casing is (Bronze for common, Silver for uncommon, Gold for rare, White for legendary)

Type
Mods can only be attached to their indicated type of item. They may be generally applicable to weapons, Warframes, or companions (i.e. “Warframe Mod”) or specific to their respective class (i.e. “Trinity Mod”). The type is listed in the top left of the description of the mod.

Mod Rarity
Mods vary in rarity as indicated by the border color.

Mod Capacity
Warframes, companions, and weapons have a limited capacity for Mods equal to their Rank(Max 30). Warframes/Companions and Weapons can be supercharged with an Orokin Reactor or Orokin Catalyst which doubles the available Mod capacity. Mod Capacity functions as a limit to what mods can be equipped depending on their drain.

Warframes and companions have 10 slots for mods. Weapons and sentinel weapons have 8 slots.

Aura mods for Warframes increase Mod Capacity rather than drain it. This can be from an additional 1 to 18 Mod Capacity.

Polarity
Some slots are “polarized.” Each type of Polarization has a unique associated symbol. Putting mods of the correct polarization into a polarized slot will lower the mod capacity used (rounded up) by 50%. Conversely equipping mods of the different polarization into a polarized slot will increase mod capacity drain by a quarter of the starting cost of mod, rounded mathematically.

Mod Rank
Mods have levels ranging from 0 to as high as 10 (typically 3-5). When the level of a mod is greater than zero, it is indicated by blue dots on the bottom of the card.

Each rank requires twice the mod energy than the previous rank to level up and leveling up from rank 0 to 1 sets the base amount of mod energy for this calculation. See Fusion.

Conclave Score
Conclave is a special player versus player (or PvP) mode that pits one player against another in specialized arenas. Each mod, weapon, sentinel, or Warframe is calculated through a Conclave score system. Mods that deal damage for example, such as Hornet Strike will make the weapon more powerful, thus requires more points to equip than Trick Mag which gives you more ammo. Conclave arenas are blocked by specific point requirements, to make it more of a fair fight between Tenno. If your build has a total of 1,000 conclave, for example, you cannot join a conclave map with a requirement of 400 maximum, and must choose a higher tier.

Mod Rating
Each Tenno's mod collection has an overall rating, which is visible in the upper-right corner of the Mod Collection screen. All mods contribute certain amounts of points toward one's overall mod collection rating. The points a mod gives are determined by rarity and rank, and otherwise are the same from mod to mod; fusion cores follow similar rules, but have their own quantities of rating points.


 * Since √2 is irrational, the decimal values listed are approximations, listed for reference only. Due to using irrational numbers in these calculations, rounding inconsistencies can introduce variance when calculating total mod ranking, but it should always be within +/- 1 of the correct value.

Mod Stacking And Selling
Introduced in Update 12, mods of the same type and fusion level will combine into essentially a mod stack, with a number on the top left showing how many of that card is available. This process is essential in reducing clutter and is also used to ease the process of selling mods.

When selling a mod, you can either select one or a pack, and click "sell". This will sell one mod, and not all mods included in a stack. If you wish to sell more than one of the mods in the stack, click the "Sell" button before clicking on a set of mods. This will open up the menu (shown below) which will allow you to select the number of mods you wish to sell, including a "Sell All" option which will sell the entire stack.

This stacking system also plays a role in Fusion. When fusing a mod and then selecting a stack of cores or mods, the number available is how many of that card you need to level up the mod, or the entire stack if you require more. For example, if you are leveling up a mod using fusion cores, and you have 50 cores of that type, it may say "15 Available" on the menu, meaning it will take 15 of those cores to get the mod to max rank. Since this deals with max ranking however, you have to do some guessing or math to figure out how many you need to get to a specific level.

Installing Mods
To install mods on an item, drag a mod from the collection and drop it on a Mod slot. If the Mod Capacity drain is less or equal to the item’s remaining Mod Capacity it will install and Mod Capacity will be deducted. Drain can be modified by polarities:
 * Matching polarity reduces drain: (e.g.Rhino Stomp costs 10, but dropped into Power polarized slot costs only 5)
 * Differing polarity increases drain by a quarter, rounded mathematically: mod levels 0-1 add 0, mods 2-5 add 1, mods 6-9 add 2, mods 10-13 add 3, mods 14-16 add 4...

Bonus Stacking
To prevent exponential bonus stacking, players can't put duplicate mods in a single piece of equipment. For example, a given pistol can only have one Hornet Strike mod in it at a time. However, a dual stat mod can be applied at the same time as a mod that gives one of its stats. For instance, Vitality and Vigor can both be applied to same Warframe, while Vitality increases Maximum Health, and Vigor increases Maximum Health and Shield Capacity.

For mods increasing shield, health or power, bonuses are calculated from the Warframe's base value. This prevents exponential increases with the passive leveling bonuses introduced in Update 7.6.

Mods increasing damage or adding special damage types do not conflict with each other and may be stacked to increase the overall damage output. However each two elemental mods will be added up into a Combined Element, with different damage multipliers against certain enemies.

Fusion
Mods can have their overall power increased by the process called Fusion. This takes mods or Fusion Cores and combines them together to increase the overall power of a Mod.

Special Mods
Types of mods that cannot be acquired through normal means are listed below:

Aura Mods
Aura Mods are special mods that benefit the entire Cell and also increase the player's Warframe total mod capacity.

Stance Mods
Stance Mods are special mods for Melee Weapons. They increase the player's melee weapon mod capacity and unlock unique attack combos.

Nightmare Mode Mods
Nightmare Mode Mods are essentially mods with dual stats. They can only be acquired through completing missions in Nightmare Mode.

Corrupted Mods
Corrupted mods can be obtained from the Orokin Derelict, using special Dragon Keys to unlock vaults located within. These mods have dual stats, one being a bonus, the other being a various negative side effect.

Damaged Mods
Damaged mods are weaker versions of various normal mods that are automatically picked up during the course of the Vor's Prize quest missions.

Mod List
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 * -|Kubrow=
 * -|Aura=
 * -|Stance=

Archwing Mod List
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 * -|Archwing Gun=
 * -|Archwing Melee=