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Prismatic Sphere


School abjuration; Level sorcerer/wizard 9; Domain artifice 9, protection 9, sun 9

CASTING

Components: V

EFFECT

Range 10 ft.
Effect 10-ft.-radius sphere centered on you

By the way...
This spell does not start fires on a ship unless the ship passes through the spell effect and rolls a natural 1 on its saving throw against fire damage. A prismatic sphere moves with a ship if it is anchored to the ship. Otherwise, it does not move with a ship.

Source Skull & Shackles Player's Guide