"What?!" Song Zhenxi smacked their hands on the table in disbelief. "You, a poisons master, can't identify it? Wasn't it just a poisoned arrow?"
Xian Wu sighed wearily.
"There was only viper venom coated on the arrow, so all it required was the antivenom to resolve. It was when I checked his pulse and ran a test on his blood that I noticed some other strange substance flowing in his veins. Not to mention he coughed up bile and blood for an entire day until I somehow managed to make a stabilizing agent...which took me another full day. So troubling! Those bastards at Lushang Sect must've done something involving the demonic arts."
With an air of calm, Song Zhenxi replied, "That's all the more reason why you've got to make him confess what he knows."