Artillery Shell

A small bead of enchanted silver, with large, deep lines carved into them, which pulse with a bright red glow. 

When an artificer uses this with an arcane cannon, they may add 2d6 to their attack damage. Additionally, they may take a -5 to attack and activate the artillery shell before firing to add 4d6 instead. 

Anyone may use this as a form of explosive, which will explode one turn after its use. The explosion deals 4d6 damage.