My Gift Lvl 9999 Unlimited Gacha: Backstabbed in a Backwater Dungeon, I'm Out for Revenge!

Light, a young human boy, sets out from his homeland with the goal of becoming a great adventurer. However, his gift of Infinite Gacha only produces useless junk. As a result, he is given the lowest rank of F-class by the adventurer's guild. Despite that, the Concord of the Tribes, a party that advocates racial equality and seeks to end discrimination, extends him a hand. He is welcomed into the powerful party and takes on the world's largest, toughtest, and deadliest dungeon, the Abyss. However... (Source: Muse Asia)