Darkweaver

Darkweavers are trained in the alchemical arts. They have developed techniques to improve their mobility in all three dimensions, and mastered the art of poison crafting. 

Level 3: Deadly Alchemist

Proficient with Alchemist's Tools and expertise with the Poisoner's Kit.

Level 3: Spider on the Wall

Climbing no longer costs you extra movement, and difficult climb surfaces are considered normal for you.

Level 3: Predator

When hitting an enemy on lower ground with a ranged weapon, add your proficiency bonus to the damage.

Level 9: Poisonous

When you hit with a melee weapon and deal at least 1 point of damage, your target must make a Constitution save against your spell save DC (8 + Intelligence + Proficiency), or they will be poisoned for one hour and take an additional 2d6 damage.

Level 9: Shadow Magic

When you are in dim light or darkness and out of line-of-sight from all enemies, you can use your bonus action to become invisible until the end of your turn.