Kaiba's practiced his warding. He should be prepared. But he's blown back by this, thrown into a nearby wall with a yelp---but still standing, if only through sheer willpower.

"Chill out, would you?"

Using ice after a wave of fire is risky, to say the least, but he concentrates his will on her dueling spot and draws on any remaining moisture in the air, sending an ice wall flying at her from a short distance away.