cn medium construct 

Perception +9; darkvision

Languages Common (Can't Speak Any Language)

Skills Acrobatics +11, Crafting +5, Deception +10, Stealth +11

Str +2 Dex +4 Con +1 Int -2 Wis +2 Cha +1

AC  19; Fort +8, Ref +11, Will +7

HP 50; Immunities bleed, death effects, disease, doomed, drained, fatigued

Backdrop When a creature attempts to Strike a living graffiti and critically misses, the attacker hits the surface (a wall, canvas, or so on) behind the living graffiti. This may damage or break the weapon or surface.

Surface-Bound A living graffiti can move only along flat surfaces such as floors and walls. If the surface it's on is destroyed (such as a portrait hit by a fireball spell or a puddle being splashed), the graffiti takes 2d6 damage and is shunted to the nearest flat surface. If there is no flat surface within 5 feet, the living graffiti is destroyed.

Speed 25 feet

Melee [>] fist +13 (agile, finesse), Damage 2d4+4 bludgeoning

Ranged [>] splatter +11 (nonlethal, range increment 20 feet), Damage 1d4+4 plus blinded 1 round

Extinction Curse #1: The Show Must Go On, page 84.