Plague Rat

Species Feat (Prerequisite: Level +4, Ratter)

You become the carrier of an infectious disease, which you can transmit with your bite. Choose one of the diseases below. You are immune to the chosen disease, and when you hit a creature with your bite attack, you can attempt to infect the target with that disease. The creature must succeed on a Constitution saving throw with a DC equal to 8 + your proficiency bonus + your Constitution modifier or contract the disease and immediately become subject to its effects. At the end of each of its turns, the creature can repeat the saving throw, recovering from the disease on a successful save. Undead and constructs are unaffected by this ability. Once you attempt to infect a creature with a disease, you can’t attempt to infect a creature with that disease again until you finish a long rest. A creature that succeeds on its saving throw against a disease becomes immune to that disease for 1 week.

You can select this feat multiple times. Each time you do so, you must choose a different disease.

Blinding Sickness. Pain grips the infected creature’s mind, and its eyes turn milky-white. The creature has disadvantage on Wisdom checks and Wisdom saving throws and is blinded.

• Filth Fever. A raging fever sweeps through the creature’s body. The creature has disadvantage on Strength checks, Strength saving throws, and attack rolls that use Strength.

• Flesh Rot. The creature’s flesh decays. The creature has disadvantage on Charisma checks and vulnerability to all damage.

• Mindfire. The creature’s mind becomes feverish. The creature has disadvantage on Intelligence checks and Intelligence saving throws and behaves as if under the control of the Confusion spell during combat.

• Seizure. The creature is overcome with shaking. The creature has disadvantage on Dexterity checks, Dexterity saving throws, and attack rolls that use Dexterity.

• Slimy Doom. The creature begins to bleed uncontrollably. The creature has disadvantage on Constitution checks and on Constitution saving throws it makes against effects other than attempting to recover from this disease. In addition, whenever the creature takes damage, it is stunned until the end of its next turn.