Lin Yi was startled, but it made sense.
Once a human turns into a zombie, they're no longer human. Getting rid of a zombie is eliminating a threat—getting rid of the sneering angel is the same principle.
What you get rid of depends on the opponent's current "identity."
Lin Yi vaguely remembered that supernatural material could energize a lamp wick, and the sneering angel's Yu Tong seemed to have a similar effect, but he wasn't sure how to operate it.
"Wei Sang, do you know how to light the lamp?" Lin Yi asked.
Wei Shan replied, "Old Lin, you should know these things better than I do. Or, maybe you could ask the boss during PE class later?"
"The boss?" Lin Yi's eyes lit up, "Oh right, I can ask her!"
"Alright, if there's nothing else, I'll be leaving now." Wei Shan finished speaking and was gone.
Lin Yi picked up the old kerosene lamp and turned to leave quietly.