Stonebane Whip
Weapon (martial, whip), Uncommon

This whip was masterfully crafted by artificers of the ancient Dhakaani empire to combat the minions of the daelkyr Orlassk. It is forged from byeshk, and does not corrode or weather with time.

Although stonebane weapons are not inherently magical, this whip ignores Resistance to nonmagical Bludgeoning, Piercing, and Slashing damage when used against creatures made of stone, creatures with stone-like natural armor (such as Gargoyles), and Petrified creatures.

As with other byeshk weapons, this whip is especially effective against Aberrations. Whenever you hit an Aberration with this weapon, the target takes an extra 1d6 damage of the weapon’s type, and it can’t regain Hit Points until the start of your next turn.

Finesse. When making an attack with a finesse weapon, you use your choice of your Strength or Dexterity modifier for the attack and damage rolls. You must use the same modifier for both rolls.

Reach. This weapon adds 5 feet to your reach when you attack with it, as well as when determining your reach for opportunity attacks with it. 

Damage: 1d4
Damage Type: Slashing
Properties: Finesse, Reach
Weight: 3

Byeshk Weapons: Byeshk is a rare and heavy metal of lustrous purple, mined from the Byeshk and Graywall Mountains along Droaam’s borders. Aberrations tied to the daelkyr—including Dolgaunts, Dolgrims, and Mind Flayers—are susceptible to weapons made of byeshk alloys, making the metal highly valued to the Dhakaani, Gatekeeper druids, and others that combat Aberrations. Dhakaani weapons forged during the Xoriat Incursion were often forged from byeshk.
Melee weapons made of or coated with byeshk are not inherently magical weapons, but are unusually effective when used to fight Aberrations. Whenever you hit an Aberration with a byeshk weapon, the target takes an extra 1d6 damage of the weapon’s type, and it can’t regain Hit Points until the start of your next turn.
The byeshk version of a Melee weapon costs 400 GP more than the normal version, whether the weapon is made of the metal or coated with it.