Poison Specialist

General Feat (Prerequisite: Level 8+, Intelligence 13+, Poisoner Feat)

You have mastered the use of poison. When you gain this feat, you gain the following benefits:

Ability Score Increase. Increase your Dexterity, Constitution, or Intelligence score by 1, to a maximum of 20.

Toxic Breach. When you deal Poison damage to a creature Immune to Poison damage, it takes half damage. If the creature is normally allowed to make a saving throw to take only half damage, it takes no damage if it succeeds on the saving throw. The creature retains its immunity to other poisonous effects such as falling unconscious or becoming incapacitated.

Lethal Precision. When you roll for the Poison damage you inflict, you can reroll one of the damage dice. You must use the new roll.