Bil’djooli Rod

Weapon (greatclub), very rare (requires attunement)

The traditional weapon of bil’djooli soldiers, this thick steel rod functions as both a melee and ranged weapon. In melee, the rod has the same traits as a greatclub and is considered a magical weapon. It does an additional 1d6 points of energy damage.

When used as a ranged weapon, it fires rays of elemental energy with a range of 60 feet against a single target. These attacks deal 4d6 points of energy damage. The rod fires rapidly, allowing you to take additional attacks as if it was a ranged weapon (treat it as magical shortbow). Alternatively, you can fire a single focused ray as an action that deals 6d6 points of energy damage, or half as much on a successful DC 15 Dexterity saving throw, to each creature it hits in a 60-foot line. This ability can only be used once a day and resets at dawn.

You choose the type of energy damage dealt by the rod and can change to a different energy type as a bonus action. You can choose from acid, cold, lightning, or fire damage, though more elaborate rods dealing thunder or necrotic damage do exist. Bil’djooli rods function perfectly well in open air, vacuum, or underwater, leaving thin trails of telltale magical energy such as thin lines of ice, and tiny bubbles of grey steam or yellow acid.