Her eyes narrowed as she saw the intense swirl of magic that was concentrated at his gauntlets. Each time they made contact with her blade, it singed the metal, but she saw nothing detrimental about it. She jumped back as she regards him with a steely look, which gave him a brief moment of reprieve as she stared at her blade that sizzled with heat.

There was no damage.

"And what curious thing are you planning to do with my instrument?" Saber only sounded mildly offended. Aestus Estus was a symbol of her status as a Saber class Servant, crafted exquisitely with magic. After she had watched him deflect her blows for a time, though, the idea was slowly dawning on her. She had smirk.

"A fool's plan; my blade is crafted from a fallen star!"

In a brief show, her blade burst with flames, an element she was quite familiar with. It dispersed a moment later, showing Natsu that he wasn't the only master of fire in this stage.

"Now-- let it smash against your body!"

Saber suddenly lunged forward, concentrating energy into blade in a single stroke as she invoked a Blossom of the Court attack.