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For the fragments, see Fragments/The Tenets.

Tenet Weapons[]

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 Tenet weapons are not based on existing, usable Corpus weapons, and are not obtained from Sisters. Instead, they can be bought from Ergo Glast of The Perrin Sequence in any Relay for 40 CorruptedHolokey.png Corrupted Holokeys each (regardless of standing with The Perrin Sequence syndicate). 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.


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.png 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. 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 Weapon from the inventory (not in Foundry or with the Kuva Lich) to fuse it with. If the weapon's element bonuses differs, the player will be prompted to choose between the two available elements. The elemental bonus caps at 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) and fuse other weapons to it.

Example: KuvaKohm.png Kuva Kohm (A) has 40% DmgHeatSmall64.png Heat Damage and an Orokin Catalyst. Kuva Kohm (B) has 52% DmgRadiationSmall64.png Radiation damage. The player has two options, to fuse (A) with (B) or to fuse (B) with (A).

Since 52% is higher than 40%, the result will always be according to the percentage of (B) and multiplied by 1.1. So 52 x 1.1 = 57.2 , (57%)

Fusing (B) to (A): Equip (A), under Valence Fusion, select (B). The result of this will be a Kuva Kohm with 57% DmgHeatSmall64.png Heat or DmgRadiationSmall64.png Radiation damage and an Orokin Catalyst. (B) will be destroyed.

Fusing (A) to (B): Equip (B), under Valence Fusion, select (A). The result of this will be a Kuva Kohm with 57% DmgHeatSmall64.png Heat or DmgRadiationSmall64.png Radiation damage without an Orokin Catalyst. (A) will be destroyed.

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. Fusion will not affect the rank of a weapon - it will retain its previous rank.

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

(Ex: a Tenet Envoy with a 43% Toxin bonus will need at most 4 Fusions to reach the maximum element bonus of 60%)

Minimum Initial Value Maximum Number of Fusions
54.6% 1
49.6% 2
45.1% 3
41.0% 4
37.3% 5
33.9% 6
30.8% 7
28.0% 8
25.5% 9
25.0% 10


  • Unclaimed Tenet weapons in the Foundry can be sold directly for Credits64.png 10,000.



See Also[]