Savior of Divine Blood ~Draw Out 0.00000001% To Become the Strongest~ is a Manga/Manhwa/Manhua in english language, manhwa series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

A player who can fight creatures from the wonders of another world. The main protagonist, Ariake Subaru, was bullied and was chosen as a player of the “Rainbow” rank, which is neither gold, silver, nor copper. He acquired the skill to freely manipulate blood, and his life and position changed completely. As he continues to fight every day, he gradually earns the title as a “Savior” who will save the world. A modern battle fantasy from the up-and-coming production team, “Studio No.9”!