Chamelind

Using your magic, you gain the ability to become one with the background. By staying still, you are able to cloak yourself, enabling non-detection to all except for those with True Sight. Any sudden movements cause the spell to end breaking the illusion and causing nearby enemies to gain advantage on attack rolls against you. 

At the start of each turn, roll a Dex Save of 12 to keep still. Failure causes the spell to end. If and when this spell is broken, you gain disadvantage on stealth rolls for your next two turns.