Destoroyah

"Destoroyah is death incarnate. Born from anaerobic environments deadly to all other life, Destoroyah seeks nothing else than the total annihilation of all life-forms in existence. Although his massive clawed hands, long crescent-tipped tail, and taloned feet can tear monsters apart in a heartbeat, Destoroyah tends to use ranged attacks in compensation for his sluggish land movement. He can breathe choking clouds of micro-oxygen, emit explosive spheres of micro-oxygen, and create oxygen destroyer comets of pure annihilation. His most fearsome attack, however, is the piercing Laser Horn, which extends from his central horn. This focused energy can slice through even the strongest monster flesh and reduces buildings to rubble."