Unstable Crumbler

SGEH

Trick Weapon (Cannon, Maul), Rare (Requires Attunement)

Cost: 4,000 gp

Base Items: Cannon, Maul

While holding this weapon, your attacks and spells deal double damage to structures, and Fire damage you take is reduced by an amount equal to your Constitution modifier (minimum of 1).

Trick Weapon

As a Bonus Action, you can switch between the Transformed and Untransformed states of this weapon. In its Untransformed state, this weapon is a roaring Cannon with smoke coming out of its mouth. In its Transformed state, the handle extends, turning the weapon into a highly unstable and destructive Maul. As part of this Bonus Action, you can do the following:

  • When you transform the Cannon into a Maul, you can shoot at your feet, even if the Cannon isn't loaded, using the deflagration to propel yourself and jump up to 30 feet in any direction. This jump doesn't cost you any movement.
  • When you transform the Maul into a Cannon, you can reload the Cannon and retain its unstable force. If you reload it in this way, the next time you hit with a ranged attack with the Cannon on your turn, you are pushed back 30 feet in a straight line.

Untransformed

The Unstable Crumbler heats up Cannonballs, transforming them into infernal ammunition. Whenever you roll a 15 or higher on the d20 when making a ranged attack roll with this weapon, the Cannonball becomes overheated and explodes on impact. When the Cannonball explodes in this way, it is considered an Explosive Cannonball.

Transformed

Whenever you roll an 18 or higher on the d20 when making an attack roll with this weapon, the Maul's head detonates, causing an effect that acts as the Fireball spell (save DC 15) centered on the target. If you succeed on this saving throw, you take no damage.