"Halloween Task: Shen Xinyu Xia Qingzi's Trick for the Best!"
"Shen Xinyu Xia Qingzi's Halloween Task: Trick or Best!"
Or, if you'd like a slightly different arrangement:
"Best Halloween Task: Shen Xinyu Xia Qingzi's Trick!"
"Halloween Task: Shen Xinyu Xia Qingzi's Trick for the Best!"
"Shen Xinyu Xia Qingzi's Halloween Task: Trick or Best!"
Or, if you'd like a slightly different arrangement:
"Best Halloween Task: Shen Xinyu Xia Qingzi's Trick!"