The frontal confrontations in the Legendary Realm usually involved a confrontation between domains and the Power of Heaven and Earth.
Legends, with their domains as the foundation, sit atop the nine heavens, commanding the Power of Heaven and Earth in all directions, bending it to their will.
The range of the Power of Heaven and Earth that a legend can manipulate depends on the size of their domain. According to common theory, the extreme distance a legendary powerhouse could control Elemental Particles of Heaven and Earth is five times the radius of their own domain. However, this also involves the legendary powerhouse's control strength and willpower; hence, many in the Legendary Realm are unable to control Elemental Particles of Heaven and Earth up to the five times limit.
But if a legend's domain is shattered, or if they have not expanded their domain, the range of the Power of Heaven and Earth they can control and the power they can unleash are far below the limit state.