"System Error" 

Zhao Nan's attack was in a shape of solid energy, meanwhile the assassin's barrier was made from thin energy that spread and shaped like a shield. 

And both of them had blue aura, so Zhao Nan's attack was able to destroy the assassin's barrier. 

The assassin's barrier broke into small pieces, and the crescent moon attack almost hit the assassin, yet he was able to dodge the attack using his daggers. 

But the collision between Zhao Nan's attack and his daggers' energy created a shock wave, and it sent him flying against the alley wall. 

BRUGH 

The assassin got thrown against the wall and his back hit the wall really hard. However, Zhao Nan's crescent moon energy was still intact and flew away to a random direction.

Xue Ming used her daggers and shot her daggers at the rest of the assassins. They were able to dodge, but when Xue Ming's daggers fell on the ground, they exploded into bright green smoke, containing fast reacting poisons.