The charybdis draws creatures and ships within 100 feet of it in the water towards it by creating a massive whirlpool. Ships attempting to avoid this require someone at the helm of the ship must make a relevant check (usually a water vehicle proficiency) with a DC of 20, or be drawn 50 feet closer to the charybdis. Creatures in the water must make a similar Strength (Athletics) check to avoid being drawn close 25 feet. Any creature or ship that is drawn to within 10 feet or closer of the charybdis is subject to a claw attack as part of the Vortex action.