Summon the devil, I am the abyss

Lin Tianhao, who has transmigrated to another world, attends the Job Change Ceremony and ends up taking on a “sewer-tier” job — Summoner. Just as everyone is mocking him, believing his future is doomed, he suddenly awakens a system and gains the skill [Demonic Sacrifice]! Who says the Summoner class is trash? I have the strongest SSS-rank talent!...