Grax possesses a twentieth level memory while his enemy Brainiac possesses a twelfth level memory. Grax also has a score to settle with Superman who destroyed his robotic army and destroyed his spacecrafts which were in the process of stealing Radonite from Venus. During Grax’s first meeting with Superman, he attaches a K-Meson Bomb onto Superman. The bomb when it detonates can destroy the entire planet.
