Black Eye (Located: Crow's Nest)
When activated, you will have to battle enemies with melee tactics to regain shield energy.

Catch (Located: The Storm)
When activated, enemies will throw more grenades.

Famine (Located: The Ark)
When activated, dropped weapons will hold less ammunition.

Fog (Located: Floodgate)
When activated, the motion tracker disappears.

Iron (Located: Sierra 117)
When activated, you will be sent back to the beginning of the stage you're on when you die instead of to the last checkpoint.

Mythic (Located: Halo)
When activated, all enemies will have twice as much health.

Thunderstorm (Located: The Covenant)
When activated, enemies will be of a higher rank.

Tilt (Located: Cortana)
When activated, enemies will become more resilient to your attacks.

Tough Luck (Located: Tsavo Highway)
When activated, enemies are skilled at getting away from projectiles such as grenades.