Mo Yuan was not stupid enough to know a mere magical arrow wasn't enough to kill a God. Sure, he boasts of having a secret technique that was sure to bring down the Black Dragon for good but the technique was yet to be perfected enough for use.
He also doubts the quality of his magic now that he is suffering from a damned curse mark and enduring the backlash of mastering the demonic feud aura through unlawful and mysterious means but he will be damned not to at least try and see what happens when a God has been temporarily stripped of his powers and made useless before him.
The arrows might hurt enough to give him more chances of capturing him and bringing him back to the First Heaven.
Mo Yuan smiled as he drew the arrows and directed the tips towards the struggling God. After a tense long moment, the arrows snapped out of his hold and travelled down targeting Lingxiao's head, heart and abdomen.
