Mod Fusions are Mods that not only give the standard effects but trigger additional abilities tied to the number of appropriate Mods installed. The Mods are only given as rewards during specific events and are tied to Weapons with the same Mod Fusion. You can use Mod Fusion mods in standard Base Weapons but they will act as normal Mods.

Cosmic Resonance

Availability
Bonuses
[1]
+15% Falloff
[2]
Damaging an enemy applies Resonance (Cooldown: 1s). Resonance increases damage taken by 2% for 5s (Max Stacks: 5)
[3]
Applying Resonance reverberates with your weapon improving accuracy, recoil and blast radius by 3% for 5s (Max Stacks: 5)
[4]
Killing a resonate enemy converts released energy directly into 10% munitions in clip (Cooldown: 3s)

Starfall

Availability
Bonuses
[1]
Reloading an empty clip increases Rate of Fire by 15% for 3s (Cooldown: 10s)
[2]
Chance on hit to trigger Starfall

Precision Torment

Availability
Bonuses
[1]
+15% Critical Multiplier
[2]
Non-Critical hits apply Tempered Nerves for 5 seconds. Tempered Nerves increases Accuracy, Recoil and Recoil Recovery by 5%. (Max Stacks: 3)
[3]
Critical kills increase Reload Speed by 25% for 2 seconds.
[4]
Reloading grants 15% Damage for 5 seconds.

Cleansing Flames

Availability
Bonuses
[1]
+10% Health Damage
[2]
Weapon hits apply Cleansing, dealing Incendiary damage for 6 seconds. (Cooldown: 2s. Max Stacks: 5)
[3]
Applying Cleansing grants you a stack of Catharsis, restoring Vitality over 6 seconds. (Cooldown: 2s. Max Stacks: 5)
[4]
Purifying Radiance: Killing an enemy affected by Cleansing causes your weapons to explode on hit, dealing AoE incendiary damage (Cooldown: 1s) as well as granting you an Incendiary damage Aura for 10 seconds. (Cooldown 10s)

Frigid Impact

Availability
Bonuses
[1]
+10% Shield / Armor Damage
[2]
Kills restore 25% Shield Capacity / Armor Durability over 5 seconds (Cooldown: 10s)
[3]
Using an ability grants an additional +15% Shield / Armor Damage for 10 seconds (Max Stacks: 1)
[4]
Breaking an enemy Shield or Armor reloads your equipped weapon and provides +15% damage for 10 seconds

Devouring Essence

Availability
Bonuses
[1]
+15% Reload
[2]
Dealing damage to an enemy decreases their damage by 5% and increases your damage by 10% for 8s. (Cooldown: 5s)
[3]
Using an ability increases Rate of Fire by 7% for 7s. (Stacks, Duration does not refresh)
[4]
Kills reduce active ability cooldowns by 20% (Cooldown: 20s)