Dark light sprites

They are the whole reason that table, and that cubbord, and that toilet disappeared. They're trouble all right!

Strategy
Basically all you have to do is reaveal something, then they pop out. Aim at them on the ground, but make sure to press X and aim at the high ones. If even one gets back to the object that was revealed, it will dissapear, and reaveling the obect again will realese another group of these fellers, not just the one that  made it dissapear again.