Marina started to understand more about Eren as their duel went on.
She realized a huge anomaly when it came to her enemy. His A-Rank mana was not running out despite the fact that he was using them to empower his intent-based spells.
It was as if Eren had more than enough mana stashed somewhere that enabled him to fight on par with an S-Ranked dragon without having to worry about his mana expenditure.
'How can a mere grandmaster Ranker have so much mana at his disposal. He is just showing off at this point. There's some trick involved. Wait a minute. Is… Is he trying to buy time? What else has he planned?'
After engaging with Eren in close combat for several intense rounds, Marina leapt back and landed a few meters away from him. She realized that she was inadvertently influenced by his pace.
She decided it was time to stop toying with her prey and unleash her true draconic power to kill Eren in the most brutal way possible.