Ballistazooka

An unwieldy projectile weapon, dubbed "Ballistazooka" by brigands. The Neoterics of Muraden invented this arcuballista for disputed trials. Those who plead innocence to the Arch Engineer would stand before its narrow sites, praying for the bolt to veer away in an act of divine justice.

Requiring both hands to use, this personal Ballista is positioned over the shoulder. Mounted on the back when not in use.
The user needs to kneel to aim properly. While using this weapon, your movement speed is reduced to 0. Counts as an Action to fire.

To reload, you need both hands, a foot, and the entirety of your bodyweight.
There is a metal grip which doubles as both iron sights and a foothold when reloading.
Requires a Bonus Action to reload, equip and unequip.

Uses Javelins as ammunition.
Every enemy in an 80 foot line needs to make a DEX save against a DC of 8 + your DEX modifier + your Proficiency Bonus.
Buildings and trees automatically fail the DEX save and are left obliterated by this monstrous heap.
Javelins fired deal 20d10 + your DEX modifier in Piercing damage. Can fire through 1 foot of solid wood.
The Ballistazooka fires Javelins at a velocity of 192 ft/s or 130.909 miles per hour.

Targets hit must make a Strength save against a DC of 20 or be knocked Prone until the Start of their next turn.
Targets hit must also make a Constitution save against a DC of 20 or be Stunned until the Start of their next turn.

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

Notes: Set: Speed (Walking), Weapon Property: Loading, Weapon Property: Heavy, Weapon Property: Two-Handed, Prone, Stunned, Damage, Combat, Ammunition, Heavy, Loading, Range, Two-Handed, Push