Rune master was indeed a profession that eat a lot of money.
Not mentioning the resources that they could obtain through hunting magic beasts, there were also many materials that they needed to form formation and so on. It was only through accumulation would they become more powerful.
To be exact, all professions will have accumulation.
But the rune master was somewhat special in a way that as long as they have enough money, they could technically be invincible in battles.
No one would be able to harm them in the slightest bit.
The main reason was naturally because rune master could prepare sets of formation plate that would trigger in some situation. In this way, they only needed to throw whatever they have prepared before in battle.
And any protracted battle would only result in their win.
Their opponent would have long exhausted their mana but they still have a stack of magic scrolls that they hadn't used yet.
But there was also weakness.
