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Astral Projection is a Level 1 Evocation that 1 mages can cast for 2, allowing them to Scry.
It's more-often-than-not worse than Astral Window, because it has the same vulnerability as Mind Hunt; every turn, Astral mages have a chance to identify the astral projection's silvery cord and cut it, Feebleminding the caster. This abruptly ends the Scrying for that month.