# Oil of Concussion

* **Rarity:** common
* **Type:** Potion
* **Attunement:** No
* **Source:** Vault of Magic


You can apply this thick, gray oil to one bludgeoning weapon or up to 5 pieces of bludgeoning ammunition. Applying the oil takes 1 minute. For 1 hour, any attack with the coated item scores a critical hit on a roll of 19 or 20.