Backstabbed in a Backwater Dungeon

Backstabbed in a Backwater Dungeon follows Light, a young adventurer betrayed by his own party and left to die in a deadly dungeon. He refuses to give up and discovers a rare skill called the Unlimited Gacha. With this power, he summons strong allies and begins his rise to greatness. Over three long years, Light trains, grows stronger, and plans revenge against those who betrayed him. Along the way, he faces cruel discrimination against humans and fights to change his world. The manga blends revenge, adventure, and emotional growth with dark fantasy action and deep world-building.