Living Paints

Capture Subject (arcane) — A creature that becomes living artwork is immediately bound to the nearest flat surface of its size or larger within 30 feet. The creature can move only along flat surfaces such as floors and walls. This allows it to end its movement wrapped around corners when on a continuous surface. While bound to a surface, the creature can attack from its space as normal, including against other creatures bound to the same surface. If the surface it's on is destroyed (such as a portrait hit by a Fireball spell or a wall being demolished), the creature takes 10d6 untyped damage and is shunted to the nearest flat surface. If there is no flat surface within 5 feet, the creature is destroyed.