The Ultimate Assist King

Spatial portals appear, magical beasts invade, and mages rise to prominence. Humanity clashes fiercely with another world! Yun Fan, returned to the days of his youth, unexpectedly binds himself to a Kill-Steal System. “Ding! An invisible strike goes straight into Shen Feng’s heart. Emotional damage +666!” “Ding! You killed a dying Devouring Rat with a finishing blow. Finishing Blow Points +21!” Yun Fan sighs softly. “How could an upright, forthright man like me possibly hide behind a woman and sneak in a finishing blow?” System (suspicious): “???”