He had no choice, his opponent were Saints and their Saint Qi are powerful enough to counter his elemental prowess, but higher type of energy or energy that have undergone a qualitative and quantitative transformation would be able to break down their barrier.
His expression quickly changes as he spat out blood, he took out the dagger from his chest and looks at the assassin with fury, the dagger was actually laced with poison that has Saint Qi on it.
He then sensed the connection between the dagger and the assassin, he grins in an evil manner before asking for help from his yang star, his palm started emitting burning hot flame that seems to warp the air around it.
He use this flame to burn the dagger, because of this the assassin once again appeared and let's out a heart wrenching scream, he felt his soul was being incinerated.