You made it through Nightmare Weekend!

You completed challenging missions and earned those Rare Nightmare Mods.   

For faster and more economical mod fusion, use your multiple copies of the same mod card to your Warframe and weapons.

The available mods from Nightmare Weekend:

ICE STORM - Pistol Mod - Increases both magazine capacity and freeze damage by 10% per rank (both max. 40%). 

STUNNING SPEED -  Pistol Mod - Increases reload speed by 10% per rank (40% max.) and stun chance by 2.5% per rank (10% max.). 

HAMMER SHOT - Rifle Mod  - Increases critical damage by 15% per rank (60% max.) and stun chance by 10% per rank (40% max.). 

WILDFIRE - Rifle Mod - Increases magazine capacity by 5% per rank (20% max.) and fire damage by 15% per rank (60% max.)   

ACCELERATED BLAST - Shotgun Mod - Increases both fire rate and armor piercing damage by 15% per rank (60% max.). 

BLAZE - Shotgun Mod - Increases both damage and fire damage by 15% per rank (60% max.)

CONSTITUTION - Warframe Mod - Increases Knockdown Recovery by 10% per rank (40% max.) and Power Duration by 7% per rank (28% max.).

FORTITUDE -  Warframe Mod - Increases Chance to Resist Knockdown by 5% per rank (20% max.) and Shield Recharge by 20% per rank (80% max.).

FOCUS ENERGY - Melee Mod - Adds Electric Damage at 15% per rank (60% max.) and Charge Speed by 10% per rank (40% max.). 

RENDING STRIKE - Melee Mod - Increases both Charge Damage and Armor Piercing Damage by 15% per rank (60% max.).