Void keys are used to travel to Orokin Voids, pockets of space that contain Void Missions. They can be bought for 75 for a pack of five, found rarely as a reward for certain mission types or obtained from Login Rewards. Keys have three ranks of difficulty and a preset mission type.
Only the hosting player needs a Void Key to begin a Void Mission. Other players may be freely invited to the session whether or not they have a key, and without their own Keys being consumed. Keys are only consumed upon successful completion of the Void Mission. Aborting, disconnecting, or otherwise failing a Void Mission will not consume the Key. However as with all mission varieties, all completion rewards, credits, blueprints, and materials are forfeit upon failing a Void Mission.
Raid keys no longer exist as of Update 10.
Void Key Types
Void Keys are ranked I, II, III and each have a preset mission type. The rank corresponds to the enemy level range and difficulty of the Void Mission, while the type determines the objective.
- I - Enemy level 10-20
- II - Enemy level 20-30
- III - Enemy levels 30-40
Enemy levels prior to Update 11:
- I - Enemy level 15-20
- II - Enemy level 21-49
- III - Enemy levels 50-120
Players also refer to the ranks as Tier 1 (T1), Tier 2 (T2) and Tier 3 (T3).
- Daily login reward.
- Purchased in packs of 5 from the Market.
- Mission success reward from:
Farming Void Keys
When farming for Void Keys, it is recommended that you play with a party of four friends. One Key is given to each player when it is given as a reward from a mission, and since only a single key is needed for four people to play a Void Mission, you are effectively given access to four Void Missions for each key you find.
Research shows that Casta, on Ceres, is the easiest mission to get keys on. It is the lowest level tier three mission. Varro on Ceres is an easier alternative. It should be noted that both Ceres defense missions have Difficulty 5. Since the displayed difficulty appears to be related with the amount of enemies spawning, although more research is required to confirm this, this potentially makes Palus on Pluto the easiest Tier 3 defense mission since it's the only one with Difficulty 1. Lastly, Callisto on Jupiter seems to also turn out Void keys often, and is much easier difficulty than Ceres or Pluto (although the reward for only 5 waves will probably not be a higher level key).