Chameleos

 Chameleos  is a large and poisonous chameleon-like Elder Dragon that has the ability to camouflage itself with invisibility almost all the time to blend the surroundings of Forest and Hills, Swamp and Jungle as long as the horn and the tail remains. They have a hood on their neck similar to real-life cobras that might help them in their flight, as well as a leaf-shaped tail and horns that aid its camouflage