Prerequisites: Alchemist’s supplies proficiency
As an action, you can expend one Maneuver Die to use a set of alchemist’s supplies to craft one Oil Bomb.
It retains potency until the end of your next long rest, but you cannot regain this Maneuver Die until this Oil Bomb is spent.
With the Use an Object action, a creature can throw this Oil Bomb at a point it can see within 60 feet. It explodes on impact, covering a 10-foot square centered on that point with Alchemical Oil, turning it into difficult terrain.
Creatures in that area on impact, and any creature that enters the area must succeed on a Dexterity saving throw or fall prone.
The Oil retains its potency on the ground for 1 minute.