Lucius was never a fighter but in that short moment after the attack, the information of a short video he saw online was flashing in his mind.
'If you're going to fight someone stronger than you, the best way to win is to simply not fight. But if you must fight, you have to land the first blow, and whilst your opponent is disoriented and drop them onto the floor!'
Whilst Xander was still reeling from Lucius's full force blow to his unprotected nose, Lucius moved rapidly.
His stance dropped and tackled Xander but he didn't target his waist but instead wrapped his arms around the back of Xander's knees
When Lucius first hit Xander it was truly a sneak attack so the damage and pain done was immense, but after the first attack, Xander subconsciously used mana to strengthen his body, equalising their physical differences