Convert the material component resource into a potent venomous barrier. Add 1 to your AC and reduce all incoming damage by 2. Increase all of your weapon action damages by their damage dice value as additional poison damage. For example, a dagger +1 will deal  1+ 1d4 piercing damage and 1d4 additional poison damage. This effect will last until the completion of a short or long rest.

Casting this at higher levels will increase the AC gained by 1.