Materialization

MATERIALIZATION
Type: M Action: Complex
Range: Self Duration: Sustained

Magicians and many critters can leave their bodies and project themselves into the astral plane. Likewise, many astral critters can project themselves into the physical world and form a temporary “body” to inhabit while they’re here. This lets them interact with, and affect, physical beings. Additionally, they gain Immunity to Normal Weapons while materialized. Materializing and dematerializing to return to the astral plane both require a Complex Action.

(p398 CRB)