Everyone in the Abyss, I Only Contract with the Abyss Lord

The abyss descends, polluting the world, and countless abyssal creatures slaughter humans. Just when civilization was on the verge of destruction, humans discovered a way to contract with abyssal creatures and drive them to fight. From then on, mankind entered the age of contractors. Lin Chuan came through the achievement system and awakened the talent of the heart of the abyss. The person he contracted must be the abyss lord. The Final Knight, the True Ancestor of the Vampire Clan, the Lady of Despair, the Ancient Demonic Dragon... While other contractors were still struggling to obtain advanced contract creatures, Lin Chuan had already gathered a group of abyss lords. ... Demon Prince: "I am just an abyss lord, but Lin Chuan has a group of abyss lords under his command." Immortal King: "Many people are afraid of me and think I'm scary, but actually Lin Chuan is scary." Succubus Queen: "If you can't beat me, then join. Does Mr. Lin Chuan still lack contract creatures?"