Ethan already moved away from the barrier a little and Freya's sister was watching as all his Mana concentrated in his fist.
She was surprised because Mana concentration was something difficult to control but Ethan was able to put all his Mana into his fist, even though he couldn't control it she was still impressed.
Once Crystal punched through the barrier, Ethan swung his fist towards her, she wasted no time in blocking the attack with her hands thinking it was some weak punch but the force behind the punch was so strong before his hand reached Crystal, the stone covering her arm had fallen off.
*BOOM!!*
The impact created a loud sound, and even Ethan who threw the punch was thrown backward by the strength behind it and just like Isabella he was worn out and struggling to catch his breath.