Venomous Cocktail [one-action] Feat 5

You can enhance your natural venom by imbibing more poison, allowing it to mix with your natural poison production. You Interact to draw (if necessary) and chug a dose of poison or one piece of projectile ammunition from a weapon you're holding that deals poison damage. Add 1d4 poison damage to the next Strike you make with your venomous jaws. The damage increases to two dice if your held weapon is advanced grade or superior grade, three dice if the weapon is elite grade or ultimate grade, and four dice if the weapon is paragon grade. On a critical hit, roll these dice after doubling the weapon's damage.