"Hey! Keep your claws to yourself Jerk! Rhea yelped when the crab nearly pinched her in half.
The water on her arm churned with white caps as she let fly with a blast of water under so much pressure that it howled down the tunnel before it crashed into the garthim with all the subtely of a wrecking ball.
Power attacking for max -5/+5 18 should hit if so thats a DC 30 with +2 knockback on the one attacking her.