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Black Tentacles

School conjuration (creation); Level bloodrager 4, magus 4, sorcerer/wizard 4, summoner 3, unchained summoner 4, 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