In a harsh fantasy realm where humans are considered the weakest and most expendable race, Light rejoices upon receiving an invitation into the Concord of the Tribes, an elite adventuring faction representing the world's diverse species. His optimism ends when his comrades lure him into the deepest floor of the lethal Abyss dungeon to execute him. Left for dead amidst nightmarish monsters, Light uses his supposed dud ability, the Infinite Gacha. Expecting useless trinkets, he triggers a high-tier pull that summons Mei, a devoted Level 9999 battle maid whose absolute power pulverizes the surrounding beasts.

Surviving the drop transforms Light's objective from fragile survival into systematic retribution. Remaining concealed within the Abyss, he amasses an unstoppable legion of Level 9999 summons—warriors, tacticians, and researchers including Aoyuki, Ellie, Nemumu, and Gold. Constructing a subterranean kingdom beneath the world's notice, Light organizes calculated strikes against the former allies who abandoned him, targeting Drago, Sasha, Garou, and the corrupt racial powers ruling the surface.

What to Expect

The narrative maintains a swift, high-tempo rhythm centered on calculated preparation followed by total tactical dominance. Combat avoids protracted struggles for Light's retinue; instead, tension stems from how the protagonist tracks down each former party member, infiltrates their strongholds, and exposes their hypocrisy. The power system relies on card-based summoning tiers, where summoned fighters possess specialized magic, extreme physical parameters, and unyielding loyalty. Political maneuvering escalates as surface nations discover a mysterious power emerging from the dungeon depths.

Who Will Enjoy This

Best suited to readers seeking ruthless revenge plots, overpowered protagonists with specialized summoning capabilities, and dungeon-based kingdom-building elements. Fans of series featuring dark fantasy retribution, overwhelming power disparities, and loyal subordinate dynamics will find the progression compelling.

Thematic Manga Recommendations

Readers fascinated by Light's tactical rise from betrayal to unassailable supremacy will enjoy Astral Sutra, which highlights ruthless martial progression, strategic retribution, and calculated mastery over arcane forces. Similarly, Apotheosis offers an intense tale of an abused underdog who turns a hidden internal cultivation system into absolute power to crush treacherous factions and claim sovereign authority.