Move #12 from Vin Moves is for an enemy that makes illusions of themselves.
When this enemy first feels itself threatened it creates two near-identical copies of itself. These copies deal the same damage, but have half the enemy’s current health and no armor. If you are the party member who got the best look at this enemy, roll+WIS. On a 10+ you know what to look for to distinguish the two illusions, describe the tell. On a 7-9 the same, but only one of the illusions has this tell.