I suppose I'm a little Rogue-pilled these last few weeks, because this week I present to you all, the Venomsoul!
Although you can play a thief rogue that can envenom their weapons as a bonus action, I wanted to take it a little further and give it a little more edge, by making a physiologically altered rogue that can flat out produce and mimic poisons and venoms by simply ingesting them!
This fun subclass has a ton of flavor potential in being an edgy poison rogue, and adds in a little progression system to the rogue akin to a Wizard, where gifting this player poisons works as a new reward/class upgrade akin to giving Wizards spell scrolls!