Planet Hammer (惑星 ハンマー Wakusei Hanmā) is a planet from the Ultra Galaxy series. It was used as the sight of the primary Reionics Battle in Ultra Galaxy Mega Monster Battle: Never Ending Odyssey and was the resting place of Alien Reiblood.
Ultra Galaxy Mega Monster Battle: Never Ending Odyssey
The location of Alien Reiblood's resting soul, it was from here the ancient tyrant called forth all those with his genes, the Reionics. At some point however, Ultraseven came to the planet and fought with his puppet Armored Darkness. The Ultra was defeated and sealed away.
Among the descendants of Reiblood was Rei, a heroic human, Reiblood who freed Ultraseven and eventually fought Reiblood's spirit with fellow Reionics Grande. Upon Rei's attempts to escape, the spirit aimed to grab the Pendragon and its crew, but was stopped by Ultraman and Ultraseven. Upon Reiblood's defeat, the Planet Hammer was destroyed by the backlash of energy.