Celestial Poisons (Su): The alchemist is able to infuse poisons with celestial power so they can affect evil creatures that are normally immune to poison. Any poison the alchemist administers to a weapon can affect undead and evil outsiders, bypassing their inherent immunities. Magical effects that negate poisons still apply. If a creature fails its save, the poison acts as normal, but may have no effect on the creature, depending on the effect of the poison (such as dealing Constitution damage to undead). An alchemist must be at least 8th level before selecting this discovery.