Your Strength score increases by 2, your Dexterity score increases by 1, and your Wisdom score decreases by 1

Blackrot age at the same rate as humans. Blackrot are not born, but are created by drinking the Betrayer's Blood and are typically already adults. 

Blackrot live to be around 55-60 years old if they are lucky.

The process of becoming a Blackrot is very chaotic and dangerous. When a person changes into a Blackrot their alignment shifts down to chaotic.

Blackrot are anywhere from 9 to 10 feet tall and weigh between 200 and 270 pounds. Your size is Medium.

When the Blackrot are created, their previous body grows rapidly. Your base walking speed is 40 feet.

The blood coursing through a Blackrot has caused many changes to the body, the eyes have adapted to see in the dark. 

You count as one size larger when determining your carrying capacity and the weight you can push, drag, or lift.

Blackrot have very potent blood. There blood can be used as a poison dealing 1d4 additional necrotic damage.

Blackrot are immune to poison and disease.

Blackrot are infused with Betrayer's Blood, allowing them to cast limited magical spells.

Cantrip: Primal Savagery

1st: Chaos Bolt (Twice Daily) & Silent Image

Blackrot are natural hunters as a result of drinking Betrayer's Blood. Gain advantage to all DEX based ranged attacks. Gain the benefit of the Sharpshooter Feat.

Blackrot maintain most of their previously known languages after the transformation. They also learn Draconic as a byproduct of taking the Betrayer's Blood into their system.

You can read, write, and speak Common and two other common languages. You can speak and understand Draconic.