psychic powers

Genetic ability that shapes the Warp through willpower.

Faith

Trait of ensouled beings that can manifest into a range of effects.

WAAAGH! energy

Warp current generated by the Orks. It's a communication network, psychic beacon and paranormal grease for Ork technology. It can be channelled by certain specialized strains of Ork called Weirdboyz.

C'tan

Beings from the beginning of the universe. Their abilities are non-magical and instead draw upon a complete understanding of reality.

Sorcery

Practice that draws upon a manipulation of ideas and symbols to conjure a Warp based effect. Can be bolstered by innate psychic powers but doesn't require them. Sorcery requires you to engage with the Warp rather consciously which makes it far more corrupting than being a Psyker. Think of it as the difference between plunging a bucket into a pool vs swimming in it. Or perhaps between reading a book with dangerous but powerful deas vs just using said book as a projectile.