As black tentacles, except it creates a Large decapitated snake, which erupts from the ground and grapples a creature you specify within its 5-foot reach. As a standard action, you can command the snake to release its grappled target and direct it to attack a different creature.
Any time you take piercing or slashing damage, a spray of acidic blood
spurts from your body in a 10-foot line, in the direction of the opponent who inflicted the
wound, dealing 1d6 points of acid damage per caster level (maximum 15d6, Reflex half). This damages the first creature or object it touches, with no splash damage.