Fantasy, how can my villain play without a system?

Introduction: (Villain + domineering + ruthless + invincible + strategy + Holy Mother not to come) A villain who has no system and no hooks, killed a group of cheating protagonists.At the age of ten, Gu Tianxing competed for the secret treasures of the immortals and killed the descendants of the major forces, causing public anger, but under the powerful background, they dared not speak out. At the age of 15, Gu Tianxing broke through the transformation of a dragon and stepped into the Tianyuan Realm. He kidnapped countless famous beauties in the world, painted them on his hips and backs for his own amusement, and finally rewarded them to his subordinates. On this day, Gu Tianxing forcibly married the saint of Qionghua Holy Land. On this day, a resolute young man made a big wedding banquet, challenged Gu Tianxing with a low level, unexpectedly beheaded him, and finally escaped with many cards.now.Gu Tianxing woke up again, but his soul had already...