Progenitor[]

Element	Progenitor Warframe*
Impact	Baruuk  Dante  Gauss  Grendel  Rhino  Sevagoth  Wukong  Zephyr
Heat	Chroma  Ember  Inaros  Jade  Kullervo  Nezha  Protea  Vauban  Wisp
Cold	Frost  Gara  Hildryn  Revenant  Styanax  Titania  Trinity
Electricity	Banshee  Caliban  Excalibur  Gyre  Limbo  Nova  Valkyr  Volt
Toxin	Atlas  Dagath  Ivara  Khora  Nekros  Nidus  Oberon  Saryn
Magnetic	Citrine  Harrow  Hydroid  Lavos  Mag  Mesa  Xaku  Yareli
Radiation	Ash  Equinox  Garuda  Loki  Mirage  Nyx  Octavia  Qorvex  Voruna

*Note that the Primed or Umbra version of a Warframe share the same element

Tenet Weapons[]

Main article: Tenet

Tenet weapons are special Corpus weapons.

Ranged Tenet weapons carried by a player's Sister and can be acquired once the Sister is Vanquished. If the player has enough weapon slots, they can claim these weapons from their Foundry, bypassing the supposed Mastery Rank requirement on these weapons. The weapons vary in attributes, dependent on the Sister the player has slain. The Energy Color on the weapon is depicted by what elemental bonus was augmented on the weapon during Sister creation and the progenitor Warframe. All weapons have an equal chance of spawning from a Sister.

Certain ranged Tenet weapons are unique to Sisters, and are not based on existing, usable Corpus weapons.

Melee and Speargun Tenet weapons are not obtained from Sisters, and the former are not based on existing, usable Corpus weapons. Instead, they can be bought from Ergo Glast of The Perrin Sequence in any Relay for 40  Corrupted Holokeys each (regardless of standing with The Perrin Sequence syndicate). Unlike weapons directly acquired from Sisters, the Mastery Rank requirement is enforced on the store-bought weapons. Each offering has a random progenitor bonus damage type and percentage increase, which is cycled every 4 days at 0:00 UTC. Only one of each weapon can be bought per rotation.

Time until next progenitor bonus damage cycling in Ergo Glast's offerings:
 55 hours 04 minutes 51 seconds 

Mechanics[]

A Tenet variant of a weapon will only provide mastery points once. A second weapon of the same variant but with a different Sister name will not provide extra mastery. These weapons have a max rank of 40. To obtain the maximum rank, the player must polarize the weapon five times, with each Forma increasing the maximum possible rank by 2 (similar to  Paracesis).

The Tenet weapons additionally have bonus damage of one damage type, ranging from 25-60% of the weapon's base damage determined randomly, with lower percentages being more common.^[1] The damage type of this bonus damage is determined by the Progenitor Warframe, as per this table.

Note: This additional bonus damage applies as weapon base damage, meaning elemental mods and status that scale from base / modified base damage will be affected.

Valence Fusion[]

Valence Fusion combines two of the same Kuva or Tenet weapons into one with a higher Elemental Bonus, multiplying the highest bonus of the two weapons by 1.1, capping at 60% bonus. Valence Fusion can be found under the Actions button while modding a weapon. After selecting Valence Fusion, a player is required to choose another of the same Kuva/Tenet weapon from the inventory (not in Foundry or with the Kuva Lich / Sister of Parvos) to fuse it with. If the weapon's element bonuses differs, the player will be prompted to choose between the two available elements.

The final value of the Elemental Bonus after a Valence Fusion is performed is given by the formula:

And if the Final Bonus is equal or greater than 58%, the value gets rounded up to 60%.

Any other properties (Orokin Catalyst, Forma, Stance Forma, Exilus Weapon Adapter, or Focus Lens) do not transfer over, meaning the order of fusion is important. Put simply, it is best to equip the weapon with the most resource investment (weapon rank, Catalyst, Forma, and Exilus that you wanted to keep) and fuse other weapons to it.

After selecting the donor weapon to be used in the fusion, a confirmation screen displays the desired weapon's new damage type and bonus values and warns that the transfer will consume the selected donor weapon. Players are then prompted to type FUSE to confirm the fusion.

For Weapons and same-tier Armaments, maximum % bonus (60%) can be achieved in the following number of fusions:

Minimum Initial Value	Maximum Number of Fusions
58.0%	0 (automatically rounded up to 60.0%)
52.8%	1
48.0%	2
43.6%	3
39.7%	4
36.1%	5
32.8%	6
29.8%	7
27.1%	8
25.0%	9

For example, a  Tenet Envoy with a 42% Toxin bonus will need at most 4 Fusions to reach the maximum element bonus of 60%.

Ephemera[]

Sisters have a 20%^[2] chance to be created with an Ephemera equipped that corresponds to the Progenitor Warframe who created them. Players will receive a Sister's Ephemera regardless of whether they Vanquish or Convert them.

Element	Ephemera	Visuals
Impact
Heat
Cold
Electricity
Toxin
Magnetic
Radiation

Hound Companion[]

After vanquishing Sister, players will also get a fully built version of the Sister's Hound as a companion, and will also drop a random Hound component blueprint for all players in the squad which can be assembled with assistance from Legs in Fortuna. The Hound component blueprints are tradeable between players. Converting a Sister will not yield these rewards.

Ally[]

Converted Sisters can randomly appear in missions after the player enters bleedout, fighting alongside the Tenno. The converted Sister's level follows the formula Sister Rank x 20 (capped at level 80 in normal mode and level 135 in The Steel Path) regardless of mission level, their weapons have a 3x damage multiplier, and will use all of their abilities. They will stay for a minimum of 2 minutes.

Railjack Crew[]

With Command Intrinsic Rank 8, Converted Sisters can be brought aboard Railjacks as Crew members.

Unlike NPC crew members hired from Ticker, the Sister cannot be given weapons and will default to using their own, cannot operate Railjack systems such as the pilot seat, turrets, and repair, do not have moddable stats, and are restricted to the Defender role. However, their health and shields are significantly higher than NPC crew members, making them built for endurance and quite suited for repelling boarders.

Sisters as crew members follows a different level scaling formula compared to randomly appearing converted Sisters: Sister Rank x 15. For example, a Rank 5 Sister will be at level 75 when they are equipped as crew members.

Regalia[]

After the player successfully defeats their first Sister of Parvos, the Sisterhood Emblem and Sisterhood Sigil will both be granted to them automatically as proof of their accomplishment. Both cosmetics can then be equipped on their Warframes as Regalia and depict the logo of Sisters. These items are only granted once.

Notes[]

• Unclaimed Tenet weapons in the Foundry can be sold directly for  10,000.
• Total number of Tenet Weapons is 15 costing 75  Forma to max rank all.

Trivia[]

• Certain Sister weapons and Ephemeras have Corpus lettering and iconography.

References[]