Lesser Void Bomb

A dark concoction with sparkles and glitter
swirling inside. As an action, you can throw this
flask up to 20 feet, shattering it on impact. Make
a ranged Attack against an object, treating the
Lesser Void Bomb as an improvised weapon. On
a hit a small void that absorbs everything in the
material plane within a cubic foot sphere appears.
After 1s it disappears, leaving only air behind.
Ingredients: Shadow Gravel, Molten Obsidian,
Magic infused Flask