Bane of Existence

This small black glass orb contains a swirling cloud of violet-black vapor. Shadowy tendrils constantly crawl across the inside of the glass.

As an action, you can throw the orb into the air, where it shatters in a burst of dark violet mist, casting Bane at 3rd level, requiring no spell components.

Choose up to five creatures within 30 feet of you. Each target must succeed on a DC 13 Charisma saving throw or become affected by the spell. Whenever an affected creature makes an attack roll or saving throw, it must roll 1d4 and subtract the number rolled from the result.

The spell requires Concentration, as normal, and lasts for up to 1 minute.

Bane of Existence has 1 use and is destroyed when thrown.