Discordant Thunderstave

Alter: This thin, hollow quarterstaff has the finesse property and reverberates when it strikes a target. You gain a +1 bonus to attack and damage rolls made with this magical weapon. When you hit a target with this weapon and roll max damage, the hollow staff shudders and emits a deep, thunderous sound. When that happens, roll the weapon's damage die again and add it to the total damage of the attack (repeat if it maxes again, until not). This extra damage is thunder damage.

Attunement: no
Rarity: Uncommon
Type: Quarterstaff
Cost: 324gp

Griffons Saddlebag, Vol 1