After Binding to the Villain System, the Demon Lord Went on a Killing Spree

Awakening a System should have been the perfect start, but his System wants to devour him. After transmigrating into Su Ming, the young master of the Xuan Yin Demon Sect, he bound himself to the [Daoheart Demon Seed] System. It should have been the standard script for a villain to rise to power. But Su Ming soon discovers that the more the System gives him, the more terrifying the price it demands. It is actually an altar for the resurrection of an ancient demon god, and he is the perfect sacrifice chosen for it. Should he obey the System and walk to his doom on the path to invincibility? Or defy fate and carve out a path beyond the realms across myriad worlds? Watch as a modern soul, guided by reason above all else, becomes a Demon Venerable in this dark xianxia world and sets out to transcend it.