The Electric Tennis Ball (E.T.B) item card introduces an intriguing and potent element to the gameplay in Backrooms TCG™. Ostensibly resembling a regular tennis ball, the E.T.B hides its true identity under a misleading exterior - marked only by an atomic stamp as a testament to its powerful properties. The ball's unassuming appearance belies its electrical charge, derived from an atomic element of uncertain origin, adding a unique element of unpredictability and excitement to the game. Lightweight and accompanied by a subtle vibration when held, the E.T.B springs to life once the atom symbol is pressed, transforming into an energized projectile to be hurled at targets within a matter of seconds.