Xuanhuan: The Dragon Lord Merchant of Another World

[Decisive and ruthless + morally gray protagonist + no saintly behavior + protagonist is a monster + evolution] Long Yi was sent to a cultivation world called the Azure Realm because a truck driver wanted to meet his sales quota. He transmigrated into the body of an Ice Wyrm that was near death after being besieged by cultivators. Just as Long Yi was about to experience transmigration all over again, he bonded with the God-Tier Trading System. By completing trades approved by the System, he could gradually grow stronger and evolve into a dragon. From then on, a notorious “merchant” appeared among the demons of the Azure Realm. “What? You want to buy my mount?” “What? You even have a chance to become an emperor?” “What? You actually lend money at usurious rates?” “What? I'm the Demon Lord who makes all the worlds fear their nightmares, and you want to trade with me?” Business is all about honesty. No matter your background, cultivation, or race, as long as you have spirit stones, you're fair game for me to fleece. Heh heh heh!