Sunder [CARD] (Patreon)

Weapon (dagger), rare (requires attunement by a spellcaster)

A crystalline weapon from times of old, broken but stronger than ever. This magic weapon has the versatile property and deals 1d6 damage instead when wielded with two hands.

Brilliant Blade. Once per turn when you take the attack action, you can forgo one of your attacks, expending a spell slot of your choice and infusing this weapon with destructive power. A wave of magical energy slashes forth from the broken blade in a wave that is 5-feet tall and extends from you in a cone with a size equal to 10 times the level of the expended spell slot. Each creature in the area must succeed on a dexterity saving throw with a DC equal to 11 plus the level of the expended spell slot. On a failed save a creature takes 1d10 force damage per level of the expended spell slot, or half as much on a successful save.

More of a show piece than a proper weapon, Sunder was a true showstopper with a blade carved of flawless gemstone. But just as any treasure so precious, it ensnared the hearts of the covetous who desired it for themselves. Amidst a furious struggle of theft and betrayal amongst friend and foe alike, the crystal blade was shattered. Though many lamented the loss of its beauty, Sunder found itself finally free from the shackles of appearance and awakened as a true instrument of war, bending the magicks around itself to dispense destruction unto the world.