Mana rush is an advanced mana user technique.
It is one of the most difficult techniques that a mana user can use, It requires extreme control of your mana and precise skill to use mana rush effectively.
Mana rush usually flows out like water but every users technique is different the more advanced the user is the more refined the rush is.
Mana rush is used to cover objects and weapons the caster can control, they can dip anything in their mana rush, It has never been use to take control of a barricade in history.
Mana rush can be casted from any part of the body the easiest way is to cast it from your hands, many users struggle to use mana rush effectively since covering something requires a lot of mana and covering something that they are not able to touch is even more difficult.