Proficiency required: Poisoner's kit

Apprentice

You may apply poisons to a weapon you wield as a bonus action. You do not need a hand free to poison weapons you wield.

Journeyman

By spending an hour after the end of a long rest, you may spend material components equal to the following table to craft up to three poisons of your choice. You unlock the ability to craft the poisons under the Journeyman Poisons. Upon unlocking the higher tiers within this profession, you are able to craft the poisons under their respective tables.

In addition, increase the DC of any poison you apply by an amount equal to your Proficiency bonus.

Master

When you poisoned an enemy, the target takes half the normal damage on a successful saving throw. If the poison already causes the target to take half damage on a successful save, instead they are poisoned until the start of your next turn on a failed saving throw.

Grandmaster

If an enemy would fail their saving throw against a poison you have administered, at the start of their next turn they take half of the listed damage again.