Urushi Constrictor 2014

Has advantage on Dex (Stealth) checks made to hide in jungle terrain.

Its skin is embedded with vines and poisonous leaves that burn on contact. A non-Construct or Undead creature that touches the constrictor or hits it with melee attack while within 5 ft. of it takes 7 (2d6) poison.

A creature infected with this disease manifests symptoms within 1d4 hrs which includes gradual spread of painful itchy rash that develops into inflamed and blistered skin during 1st day. Until disease is cured infected creature: disadvantage on Con saves to maintain concentration on a spell and disadvantage on Dex and Cha saves and ability checks. At end of each long rest infected creature: DC 15 Con save. If it succeeds on two saves it recovers.