[Cosmos] Weapon - Chainwreck

Mass-produced by Empyrean Enterprises, these weapons are standard-issue personal melee weapons for exoplantery assault forces. Soldiers know them by their nickname "Chainwreck," rather than their official designations of Drive-Chain Blade Series Resolute-1 through 4.

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Chainwreck
Weapon (any chain blade weapon), technomancy, uncommon (optional attunement)

Jagged Edge. When you attack with this weapon and miss a target's AC by 1, the target takes 1d4 slashing damage.

Drive Saw. While you wield this weapon, you can use a bonus action to activate a switch and power up its cutting chain. For the next minute, you have a +1 bonus to attack rolls made with this weapon and if you damage a target with this weapon's blade, including through the Jagged Edge property, you deal an extra 1d6 slashing damage. Once used, this property can't be used again until the battery recharges at dawn.

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Optional Attunement. If you choose to attune to this weapon, you can magically recharge its integrated arcane battery. While you wield the weapon, you can use an action to expend a spell slot of any level to charge it, regaining an expended use of the Drive Saw property.

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Rare Variant. For the rare version of this weapon, its Drive Saw property can be used three times instead of once, regaining expended uses daily at dawn. If you attune to it and expend a spell slot to charge its battery, you regain a number of expended uses of the Drive Saw property equal to the spell slot level, regaining up to three uses.

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DESIGN COMMENTARY

Edit: Revised extra damage to d6. I can't believe I thought thunderwave dealt 3d8 damage for so long — it's 2d8! It's burning hands that deals three dice (3d6) of damage. The max number of uses have also been limited to prevent players from "storing" spells in the weapon.

Hello and welcome all to the newest theme! We're going to be diving into the technomancy world partially hinted/established in the previous Cosmos compendiums, with new items, new subclasses, a couple spells, and a Gridspace location. As part of this theme, I'll also be incorporating it into the Cosmos compendium and update it to v3, which includes a variety of extra fixes and improvements.

The Chainwreck is a chainsaw blade weapon, one of several intended to make use of the reflavored futuristic weapons introduced in the Cosmos compendium. Jagged Edge is a ribbon that provides an extra 2.5 damage every 1/20 attacks, flavored as "grazing" your enemies with the saw teeth. Making 30-50 attacks per day, you'll deal an average of 5 extra damage — hence the ribbon.

The Drive Saw property is much more useful, briefly transforming this into a rare-level weapon. Given you can only use it once, this places the final item at Uncommon (including the fact that you don't need to attune to it). This is comparable to a +1 weapon, instead concentrating all its benefits into one battle rather than the whole day.

The optional attunement grants an extra ability to use Drive Saw more often. This mainly offers an alternative for spell consumption, best utilized by eldritch knights or multiclassers. Assuming a 1st-level spell slot, we can compare Drive Saw to thunderwave. Thunderwave deals 2d8 damage across multiple targets (let's assume 2). Drive Saw deals slightly more (1d6 extra damage for 3-5 rounds of combat), so we can consider it a minor improvement for attunement.