Valery swung her spear, piercing through the hearts and minds of her enemies. He didn't hold back a bit, but she didn't make her maximum effort either. Mostly because she wanted to exhaust herself, using both magic and mastery skills put a strain on her body.
Valery's energy is not unlimited, not to mention that she is not at her maximum capacity. She is currently only a Countess, not a Marquis, not a Duke and not an Archduke. It could be said that in terms of energy she was relatively weak.
Valery was taking her time, especially to think.
There was no better environment to think in than the one she liked, a battlefield. Where she was single-handedly exterminating every single vampire that crossed in front of her, the ground was stained with blood and that blood was like a banner of her conquest. Where her spear, sword and fists passed, long rivers of blood rose and those rivers were her mark of conquest.