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Blade Barrier

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School evocation [force]; Level cleric/oracle 6, inquisitor 6; Domain good 6, war 6


Casting Time 1 standard action
Components V, S


Range medium (100 ft. + 10 ft./level)
Effect wall of whirling blades up to 20 ft. long/level, or a ringed wall of whirling blades with a radius of up to 5 ft. per two levels; either form is 20 ft. high
Duration 1 min./level (D)
Saving Throw Reflex half or Reflex negates; see text; Spell Resistance yes

By the way...
The effects created by this spell do not move with a ship.

Source Skull & Shackles Player's Guide