Basic Trope: A video game boss grows more difficult as its health is depleted. * Straight: The boss is at half health. Now it breathes fire! * Exaggerated: The boss is at half health. Now it literally turns red, flies high into the air, drops nuclear bombs, and takes one-tenth damage from all attacks! * One-Winged Angel * Downplayed: The boss is at half health. Now it can move a bit faster and hit somewhat harder. * Justified: The boss's blood is corrosive, and it bleeds over more and more of the stage as it suffers wounds. * Alternatively: The attack is very painful to the boss, and he doesn't want to use it unless he really has to. * Alternatively: The boss is a Villain with Good Publicity, and the attack would compromise his/her public image. So, s/he uses it