Are you ready to enter the Orokin Vaults?
Hidden treasure awaits!
Here's what you'll need to do:

CRAFT A DRAGON KEY
Craft one or all of the Corrupted Vault Keys - also known as Dragon Keys - in the Foundry. Each Dragon Key will require a Blueprint (found in the Market for 500 Credits), any Void Key, and 250 Ferrite.

EQUIP YOUR DRAGON KEY
Equip the Dragon Key in your gear slot. Because these keys are so powerful, only one may be equipped at a time.

Remember, each Key has debilitating effects on Warframes: 
 - Bleeding Dragon Key: -75% health.
- Decaying Dragon Key: -75% shields
- Extinguished Dragon Key: -75% damage dealt
- Hobbled Dragon Key: -50% speed

These negative effects will be removed from whichever player’s key is used in the Vault.

GATHER FELLOW TENNO
There are four different Vaults and four corresponding Dragon Keys. You will find Vaults in Extermination, Capture and Survival Missions. When you find a Vault, only the corresponding key will open the door  and consume the key.

The mission can be played Solo, but you run the risk of not carrying the correct Dragon Key each time you try to enter. Team up with fellow Tenno, who can each carry one of the four Dragon Keys, to guarantee your access to the Orokin Vaults without delay.

RETRIEVE THE REWARD
Once the Vault is open, retrieve the contents and complete the mission. 
Successfully complete the mission and your reward will be one of 16 new Corrupted Mods. Each mod offers incredible benefits while also inflicting a negative effect.

Prepare your Keys and enter the Vaults!