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School abjuration; Level cleric 4, shaman 4, witch 4
Casting Time 1 round
Components V, S, DF
Range 10 ft.
Area 10-ft.-radius emanation centered on you
Duration 1 minute/level (D)
Saving Throw none; Spell Resistance yes
You bring into being a mobile, hemispherical energy field that incorporeal creatures cannot enter.
This spell can be used only defensively, not aggressively. Forcing an abjuration barrier against creatures that the spell keeps at bay collapses the barrier.