This attack has a range of 50 feet, deals acid damage, and entangles creatures in the area. A Breath save halves the damage and negates the entangle effect. An entangled creature takes 1d4 points of acid damage each round on its turn, and may attempt a new saving throw at the end of its turn every round to escape the entanglement and end the acid damage. Once a river drake spits mucus, it cannot do so again for 1d6 rounds.