Underwater Combat

When adventurers pursue karkarodons back to their undersea domain, fight off gungans in an ancient shipwreck, or find themselves in a flooded dungeon room, they must fight in a challenging environment. Underwater the following rules apply.

When making a melee weapon attack, a creature that doesn't have a swimming speed (either natural or granted by a power) has disadvantage on the attack roll unless the weapon is a vibrodagger or vibrospear.

A ranged weapon attack automatically misses a target beyond the weapon's normal range, but functions normally against a target within normal range.

Creatures and objects that are fully immersed in water have resistance to fire damage.