Xu Shi's swords should have returned He Shiyi to a state of chaos, similar to the universe's beginning. However, this was not what happened. He used a technique to rebound the attack, almost injuring Xu Shi with her own attack. Luckily, she had tremendous control over her Dao.
Taking advantage while they were in close proximity and the fact she was distracted dealing with his rebound. He Shiyi head-butted her. His head amassed infinite mass and density to the point it could even destroy conceptual beings like Eternal Great Emperors.
Boom!
Xu Shi exploded into trillions of pieces. However, He Shiyi was not happy; instead, he frowned. He sensed the power of time.
'Time Remnants?' he analyzed. The person he killed is a past or future version of her or a projection from an alternative reality.