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    Black Tentacles

    School conjuration (creation); Level magus 4, sorcerer/wizard 4, summoner 3, witch 4; Bloodline aberrant 4


    Casting Time 1 standard action
    Components V, S, M (octopus or squid tentacle)


    Range medium (100 ft. + 10 ft./level)
    Area 20-ft.-radius spread
    Duration 1 round/level (D)
    Saving Throw none; Spell Resistance no

    By the way...
    This spell can be cast on the surface of the water or on a ship's deck. The tentacles do not attack ships.

    Source Skull & Shackles Player's Guide