White Lizard is a type of Lizard (Rain World) in Rain World.
It is an ambush predator with active camouflage. It is capable of walking on walls and the background, which it uses to position itself where it can survey the whole room. It then activates its camouflage and waits for prey to pass by. Upon prey coming into range it tries to grab it with its gecko-like tongue.
Hitting a White Lizard with a spear causes its active camouflage ability to go haywire, making it flash random colors for several seconds and disabling the ability for the rest of the cycle.
