Fire: Allows you to snuff out torches after concentrating on one. Allows you to find torches and ignite them. Allows you to knock out fire guards by turning their burn off. (this is gained in latter levels as you are stronger)
Cloaking: Allows a near invisibility for short bursts. This time grows longer as you get stronger.
Vision: Allows you to see in the dark for short bursts. The duration and brightness grow as you level up.
Iron: Allows you to unlock "Lock and Key" doors after a time of concentration. The time shortens as you level up. This will not allow you to open Rune sealed gates and doors. Possible metal push and pull as you level up.
Air: Allows you to jump higher and climb faster. (I could see area where you need to jump large gaps to avoid guards.
Speed: Allows quick dashes of speed
Mist: Turns you into a human sized mist shape. It allows you to pass through smaller areas, and in some levels that have mist patches you are invisible to guards.
