Poisoner

Many brigands and shifty types use poisons in their work. You make it into an art form. Creating and inventing poisons comes second nature, and applying them in your work makes all the trouble and hardship worth it. 

Brewing up a Storm

Starting at 3rd level,

you gain proficiency in alchemical supplies and the poisoners kit

Additionally you may make poisons for half of the cost and applying them to your weapons is a bonus action rather than an action

Personal poison

When you choose this archetype at 3rd level, you may choose to make a poison for free once per day. The potency of this poision increases as you gain levels in this class. Each dose lasts for 1 minute or until you land an attack with the weapon that It is applied to. Once you land an attack, that dose is used and you must apply another dose before this damage can be dealt again. You can create a number of doses equal to your intelligence modifier each day. When you land an attack with this applied poison the creature must succeed on a constitution saving throw against your poisoner DC. On a successful save the creature takes ½ damage.

 

At level 3 this poison deals an additional 2d6 points of poison damage

At level 7 this damage increases to 4d6 and you may choose to make this poison deal fire or cold damage instead of poison damage

At 14 level this damage increases to 9d6 and you may choose to make this poison deal necrotic damage instead of poison damage

At 17 level this damage increase to 12d6

Extra Potent Poisoner

Starting at 9th level, when you craft any poison, you may change the damage type to any of the following choices- fire, cold, necrotic instead of the normal poison damage. Additionally, any effects of poisons that you make that creatures would otherwise be immune to via immunity to poison damage or the poisoned condition, i.e. the paralysis from the drow poison, if that creature is not undead, it is still subject to the non-damaging effects of the poison. 

One with the Poison

By 13th level, you have inundated yourself with enough poisons that you have fundementally changed. You are immune to poison damage and the poisoned condition. Additionally this inundation has given you insights into how poisons effect the body so creatures have disadvantage on saving throws made to resists poisons you have created. 

Master Poisoner

When you reach 17th level,  you may make full doeses of your personal poison at the end of a short rest. Additionally any other poison you create costs you no gold and ½ the time.