Chromatophoric Skin

Being named Idea on RPNation.com

Mutations in you physiology makes it harder for predators and prey to spot you. While staying motionless for one round (six seconds) your skin changes color and texture to match you surroundings. you are considered hidden while remaining motionless. as a reaction, you can rapidly shift your skin texture and color to hide, giving you a +10 bonus to stealth checks.