Void Keys

Void keys are used to travel to Orokin Void, pockets of space for Void Missions. They can be bought for 75 for a pack of 5, found rarely in Defense Missions, or sometimes obtained from the Login Rewards. Each key can generate as a different mission type and are single use. There is no correlation to the level of area to level of key. Low level missions can provide high ranked keys and high level missions can provide low ranked keys.

Tiers of Keys
Below are listed the tiers of keys and the level that the enemies will be when you start the Void Mission.
 * Tier I - Enemies are 15-20
 * Tier II - Enemies are 21-40
 * Tier III - Enemies are 50+

Available From

 * Daily login reward.
 * Purchased in packs of 5 from the market
 * Mission success reward from:
 * Raid Missions
 * Exterminate Missions
 * Endless Defense Missions
 * Capture Missions
 * Spy Missions

Needs Confirmation

 * Drop: Bosses (extremely rare).
 * Drop: Enemies (near to impossible)
 * Drop: Containers (dont even think about it)