Each trademarked blaster is fitted with a Rehydrant Battery Mark 5, a oil-lined pod enchanted with endless water, though it can still function attached to any mundane water source. The blaster is most popularly used as a piece of watersport equipment, though fire brigades and thematically appropriate adventurers find practical use.
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Torrentializer
Weapon (light crossbow), rare
This blaster uses water as ammunition instead of bolts. When you hit a target with water shot from this blaster, you either deal bludgeoning damage or cold damage (your choice) instead of piercing damage. If you deal bludgeoning damage to a target this way and reduce it to 0 hit points, you can choose to knock your target unconscious.
Deluge Nozzle. This blaster has a secondary stream mode. You can use a bonus action to charge up the blaster with water. Once charged, you can use an action to release in a line that is 5 feet wide and 20 feet long. The line extends out from you in a direction of your choice. Each creature in the line must make a DC 13 Strength saving throw. A target that fails the save takes 2d6 bludgeoning or cold damage (your choice) and is knocked prone. If you deal bludgeoning damage to a target this way and reduce it to 0 hit points, you can choose to knock your target unconscious. You also push Medium or smaller objects in the line 10 feet away from you.
Self-Refill Battery. This nonmagical blaster is supplied by a magical battery that refills it with endless ammunition. The blaster still functions if the battery is removed, provided it is connected to another water source. It consumes 8 ounces of water per shot or 5 gallons of water for each use of Deluge Nozzle.