[Eastern Relics] Shisui, Water Slasher (Patreon)

Shisui, Water Slasher

Weapon (any sword), rare (requires attunement)

Component: elemental volatile mote of water

Masters of movement and manipulators of momentum, the river ronin were protectors of the waterways. Legend says such samurai could control water with their ki, forming it into shields, whips, and whirlpools. These blades, known as shisui, gave the ronin the ability to conjure water to wield in even the driest deserts or most remote mountaintops.

This weapon has 8 charges and regains 1d6 + 2 expended charges daily at dawn. If the weapon spends 8 continuous hours fully submerged in running water, it regains all expended charges at the next dawn.

Aqua Conjuration. As an action while holding this weapon, you can expend 1 charge to create water as per the create or destroy water spell.

Jet. As an action, you can expend 2 charges to propel yourself forward up to 30 feet in a straight line to an unoccupied space you can see. Each creature in a 10-foot-wide line between your origin and your destination must make a DC 15 Dexterity saving throw as high powered jets of water slice into them. A creature takes 4d6 slashing damage on a failed save, or half as much damage on a successful one.

Torrent. When you take the Attack action while holding this weapon, you can expend 1 charge to fire a 2-foot-wide, 15-foot-long line of high pressure water from the blade in place of one of the attacks. Each creature in the area must succeed on a DC 15 Strength saving throw or either be pushed back 5 feet or be knocked prone (your choice for all targets).

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Uncommon variant: Reduce the charges to 6, the recharge to 1d4 + 2, the DCs to 13, and the damage to 3d6.

Very rare variant: Increase the DCs to 16, the damage to 6d6, and the length of the line created by the Torrent property to 20 feet.

Legendary variant: While the weapon is on your person, you can speak and understand Aquan. The Aqua Conjuration property allows you to cast the create or destroy water spell at will or expend 3 charges to cast the control water spell (save DC 18). Increase the DCs to 18, the damage to 7d6, and the length of the line created by the Torrent property to 30 feet.

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