Even though Leon's power had returned, and he could use Supernova if he wishes so, Tyrselle was confident that she could resist the power of such an attack. Their skill and power reached a point where numbers wouldn't be enough to determine the winner of the confrontation, and that was why she was being careful. She couldn't afford to lose again… she had been struggling for far too long as well… she couldn't afford to waste any more time.
However, her hesitation disappeared when Leon obtained full control over the mana of the one-hundredth planet. Why her hesitation disappeared? It was because Leon's mana pool became half of the size of hers. Tyrselle bit his lips and then started to bleed in annoyance. That happened many times before… whenever she was confident of her victory, Leon would do something unexpected and then turn the tide of the battle just like that. Besides, using Mana Link was something that he never did before, so Tyrselle had no countermeasures against it.