Most advanced mana users use this technique to clear an ambush or an enemies camp. It is also used in wars since it's a high range technique.

The mana blast can be as small or as big as the caster desires it to be, but it takes a lot of mana for a high range mana blast many users can feel mana depletion after using it.

The highest range of mana blast in the history blasted a whole town away resulting in the death of the caster, it can be quite damaging if used thoughtlessly.