Anvari's Repeating Crossbow

A curious-looking crossbow, with an attached vertical loader with 10 slots for crossbow bolts. The side of the weapon is littered with small wheels, springs, and ratchets. When fired, the mechanism moves the loader down and resets the bowstring. The size of the crossbow and its bolts remind of a smaller device but the gadgets around the loading mechanisms make it somewhat cumbersome and awkward to use. The body of the crossbow is strengthened with small adamantium elements and strips.

Previously a prototype, the mechanism has been strengthened and tuned by Fonkin Blinknottin to better resist the stress caused by lightning-fast movements. The crossbow now launches bolts slightly slower and less precision, but it is significantly more resilient to being jammed.

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When you take an Attack action and make an attack with this crossbow, you can shoot additional bolts with a compounding -2 to-hit modifier. (first to-hit roll +0, second -2, third -4 and fourth -6) up to a total of four bolts per attack, as long as the loader still has bolts left. You can apply additional bolts to any extra attacks you have during this Attack action as long as the loader has bolts left. The to-hit modifiers reset for each attack separately.

If you roll a natural 1 on any your to-hit rolls, the crossbow becomes jammed an unusable. Fixing the jam requires an Action and a DC15 INT check with proficiency bonus if the character is proficient with tinkerer's tools, or is a gnome.

Reloading the spring loader with up to 10 bolts requires an Action.

The crossbow functions as a normal hand crossbow except it does not have the light or loading properties and is considered two-handed. 

Proficiency with a Hand Crossbow allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Weapon Property: Two-Handed, Ignore Weapon Property: Light, Ignore Weapon Property: Loading, Ammunition, Light, Loading, Range, Vex