Well okay. I still need to get the names down and refresh on some D&D stuff to get it right, but...
It's about a lizardman mage who is the tribe shaman accidentally turning his ancestors' magic dark as he's a bit of a tinkerer. Needless to say the rest of the tribe, particularly his older brother (the lead warrior), are not happy with that and kick him out. His only option is to join a "horde," which is an army of a Dark Lord, and he gets an interview with the most powerful Dark Lord at that time.... only to accidentally (notice a pattern) kill him when asked to "show his power." So with no other options in life, he decides to make his "horde" and become a Dark Lord with the dark magic he made out of scratch. The Horde is essentially a band of misfits you expect from a manga, such as: a kobold who the MC thought was just the previous Dark Lord's timid advisor only to find out he was their strongest fighter; the daughter of that Dark Lord who is an elven witch who becomes the most trusted advisor (and gets annoyed at how little the MC knows about the world); a lecherous nobleman who gets roped into the gang against his wishes and provides some resources; an ancient dragon who got tired of humans, elves, etc. trying to recruit him due to how smarmy they sound to him and joins the horde because he can actually get along with the MC; and a tabaxi assassin who becomes weirdly obsessed and loyal to the MC.
I didn't have a title, but I think I just might call it "The Horde"