Riven Mods

Riven Mods are special mods for Shotguns, Secondary weapons, Assault Rifles, Bows, Launchers, Sniper Rifles, and Melee weapons, as well as most Sentinel weapons.

Riven mods
Rivens mods are unique amongst other mods in a variety of ways. They:
 * require the player to complete stated challenge to reveal its weapon assignment and attributes
 * carry anywhere from two to three different bonuses
 * can carry a negative stat, whose effects can be crippling but greatly increases the potency of bonuses
 * have an inconsistent polarity
 * have their own Mastery Rank requirement independent of the weapon
 * can have its attributes re-rolled with the use of Kuva
 * are assigned to a single weapon per Riven mod, likened to Syndicate mods
 * cannot be equipped alongside another Riven mod
 * are earned from completing the daily sortie missions

A single Riven Mod is given to players upon completion of The War Within quest, and additional Riven Mods can be acquired as rewards from Sorties.

Upgrade costs and Trading Credit taxes of Riven mods are equivalent to those of Rare mods.

Players start off with 15 inventory slots for Riven mods, able to be increased by purchasing 3 slots for at a time up to 90. Receiving a Riven mod while being at the current limit will block access to any further Sorties, and the player will be given a choice to purchase slots, trade away a Riven mod, or dissolve a Riven mod of their selection.



Challenges
When a player receives a Riven Mod, it is Veiled and: Furthermore:
 * will not take up mod capacity
 * will not grant any bonuses or curses
 * cannot be upgraded
 * must be equipped on a weapon for players to complete the challenge stated on the equipped mod in order to reveal its attributes e.g. killing a certain number of enemies without being afflicted by Status Effects.
 * the weapon used to complete a challenge is entirely irrelevant to the resulting Riven.
 * it is possible to complete the challenges using any weapon or Warframe ability, regardless of which the Riven was equipped on.
 * if its conditions are met, the Riven will be revealed independently of mission success.

Attributes
Rivens are distinct from regular mods in that they are inconsistent in Polarity, Mastery Rank requirement, attributes and have between two and four attributes. It is possible to have Rivens to grant a very powerful set of bonuses with a negligible curse and vice-versa i.e. Soma Sati-Critatis with a curse that reduces status duration.

Riven mods draw their names from a size pool of 30, indicated by the randomized/rerolled attributes that the new mod has. Names consist of a prefix and/or a core and suffix and follows  "Prefix-CoreSuffix" or "CoreSuffix".

The 30 positive attributes are:

&#42;Melee exclusive attributes.

Disposition
The randomized attributes for Riven mods are affected by Disposition, a modifier provided by the system that collates the usage popularity of a given weapon across the entire player base. Disposition strength controls the range of the attributes available for each weapon. There are five different ranks of Disposition that can be assigned:


 * Competent: Assigned to the most infrequently-used of weapons. Rivens with this disposition provide the greatest bonuses.
 * : This Disposition is assigned to less popular weapons, and Riven mods provide above-average bonuses.
 * : Weapons that see average usage within the player base, resulting in an equally average range of attributes.
 * Mild: Slightly more popular weapons will see a less powerful Riven mod.
 * : Assigned to powerful weapons that see very high usage, this Disposition creates Riven mods with the most restrained of attributes.

Disposition is shared between all variants of a single weapon, e.g. the Braton shares the same disposition with its Vandal, Prime and MK1 variants.

If a weapon's disposition is changed, the attributes on already unveiled Rivens for the weapon will be automatically adjusted to match the new disposition. e.g. AkLex disposition reduced from 5 to 3 in 

A weapon's Disposition can be seen in the Arsenal under the Upgrade tab, but only when a riven which can be equipped to that weapon is currently owned.

Below is a list of weapons by Disposition:


 * -|All=
 * -|Primary=
 * -|Secondary=
 * -|Melee=
 * -|Sentinel=

While not listed in the above table, all Zaw Strikes have neutral disposition.

Cycling (Re-Rolling)
Another unique aspect of a Riven mod's attributes is their ability to cycle (re-roll) the attributes via the Cycle function in the Mods segment in the Orbiter. A Riven mod is cycled after spending Kuva, found through Kuva Siphon objectives on planets close to the Kuva Fortress or as an uncommon reward for completing Bounties.

Cycling a Riven mod affects the number of attributes, as well as the final numerical attribute, but not the current weapon designation, mod rank, polarity or Mastery Rank requirement. Dispositions belong to the weapons and not the mods, and thus a cycled riven will not have attributes outside its own range of values.

After cycling a mod, both the old version of the mod and the new version is displayed, and players can choose to keep the version they prefer.

Cycling a Riven mod starts off with 900 Kuva for the first cycle and increases on subsequent cycles of the same mod, capped at 3500 Kuva. The number of cycles is indicated by a clockwise arrow at the bottom right of the Riven mod.

Total Kuva cost to roll Total Kuva saved over 9 rolls by rolling an unrolled riven compared to a high-rolled one: 15,050
 * an unrolled riven 9 times: 16,450
 * a high-rolled riven 9 times: 31,500

Transmutation
If a player has excess Rivens and are comfortable with doing away several of them, a Riven Transmuter allows them to sacrifice four Rivens in their inventory for a new, veiled Riven mod.

The Riven Transmuter is a drop acquired from the Hydrolyst, consumes four Riven Mods to transmute them into a veiled Riven mod. If four of the same type of Riven Mods are transmuted i.e. all shotgun, all rifles, all melee, etc then the new Riven mod will be of the same weapon class.

Upon transmutation, four Riven mods and the Riven Transmuter will be consumed.

Trivia

 * Riven mods feature a dynamic image, which constantly shifts between the images of the bonuses. For example, a Riven Rifle mod that affects Critical chance and Critical damage (positively or negatively) will shift between 's image and 's image.
 * Interestingly, Riven Mods that affect Status Chance use the images of Thunderclap, Crowd Control, Stopping Power, or Staggering Force, as opposed to , , , or.
 * Riven is the past participle of the Middle English verb Rive, which means "to violently tear apart".
 * Taking into account the existence of 24 possible positive effects, the possibility of one negative effect, and that elemental damage and punch through cannot be negative attributes, also the fact that effects don't fall into the same category nor does order matter: there are 5,083 possible Riven Mod stat combinations that have two positive effects and one or zero negative effects, and 35,673 possible Riven Mod stat combinations that have three positive effects and one or zero negative effects, making a total of 40,756 different combinations for a single Rifle, Shotgun, or Pistol Riven.
 * The total Endo gain from dissolving a Riven Mod is equal to, rounded up. So, the base value for an unranked, unrolled MR13 mod would be , rounded up to 523.

Bugs

 * If a Riven Mod is unveiled while already being on the weapon it turns out to be for, it will remain on the weapon but not drain any mod points. This also allows weapons to reach negative mod point values.

Media
For more examples of Riven mods, see here

Patch History
Mod Riven Моды разлома