Magnet Warrior Omega Plus (MZMU-EN054) [Maze of Muertos]

If this card is in your hand or GY: You can destroy 1 other Rock monster in your hand or face-up field, and if you do, Special Summon this card, but banish it when it leaves the field. When an EARTH monster's effect is activated on the field (Quick Effect): You can Tribute this card, then target 1 face-up monster on the field; change it to face-down Defense Position. You can only use each effect of "Magnet Warrior Omega Plus" once per turn.