Everyone was wondering what these creatures were. Even Betty was caught by it. She tried to stab it using the sword in her hand, but she felt so weak that her attack could not get rid of it.
Also, even though the sword had successfully stabbed the creature, she noticed no blood was dripping. Even after she took back the sword, she could not see a wound from it.
It was fortunate for the Senior Leader to escape from it. Before it absorbed his mana, he already noticed a thin fluctuation of magical energy behind him.
He discharged a sudden surge of mana all over his body to rid it, but the effect of his move was contrary to his expectation. Whatever was behind him, it did not disappear, in fact, he noticed that the fluctuation of magical energy grew bigger than before he discharged a sufficient amount of mana.
"Tsk! It's a mana-eater!" The Senior Leader concluded.