Arrayed Potion of Toxic Healing

The potion's Green liquid glimmers when agitated. This Potion of Healing is designed for Assassins and poisoners and is infused with various poisons and venoms. The potion reacts unpredictably depending on the user and may have different effects each time.  Owing to body chemistry, the healing potion may counteract the effects of the poisons or the poisons may counteract the effects of the healing potion. After drinking the potion you regain 1d4 + 1d6 + 1d8 + 1d10 + 1d12 hit points minus 1d20 hit points a creature who survives consuming the potion is immune to poison for 24 hours.

Notes: Bonus: Hit Points, Bonus: Hit Points, Bonus: History, Bonus: Hit Points, Bonus: Hit Points, Damage: Poison, Immunity: Poison, Healing, Buff, Consumable