Arbelladon Oil of Nightshade

This clear, gelatinous oil sparkles with tiny flecks of amethyst resin, derived from nightshade berries. The oil can coat one slashing or piercing weapon or up to 5 pieces of slashing or piercing ammunition. Applying the oil takes 1 minute. For 1 hour, the coated item is magical and victims who suffer an injury from the weapon are poisoned and suffer an additional 1d6 poison damage, and again at the beginning of each subsequent turn.  At the end of each turn, they can make a DC 13 constitution save to end the poisoned effect. 

Notes: Bonus: Magic, Damage, Buff, Combat, Consumable