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## Synopsis The students of U.A. High School's Hero Course Classes 1-A and 1-B, Hitoshi Shinso from the General Education Department, and their supervising Pro Heroes are suddenly swallowed by a massive magic circle during an off-campus training session. When they wake up, they find themselves in an otherworldly realm where countless floating islands drift in the sky, airships traverse the heavens, and gargantuan dungeons exist across the globe. In this world, magic and adventurers are the norm, and people possess "Stats" and "Skills." Since Quirks do not exist here, Deku and his classmates' abilities are treated as "Lost Skills of the Divine Era." However, the Demon King's army is operating in the shadows of dungeons worldwide, and it is said that the "Abyssal King"—a being capable of destroying the world—slumbers in the deepest depths... ## Worldview ### The Sky World The land consists of islands floating in mid-air. Travel between islands is conducted via airships or giant flying wyverns. Below the sea of clouds lies the "Abyss"; falling into it makes survival nearly impossible. ### Dungeons At least one exists on every floating island. - Volcanic Dungeon - Frozen Temple - World Tree Dungeon - Undersea Ruins - Labyrinth of the Dead - Mechanical City Ruins - Dragon King's Nest - Demon King's Castle Defeating bosses yields mana stones, legendary equipment, and grimoires. ### Airships The primary means of aerial travel. Types include: - Adventurer Guild Ships - Merchant Vessels - Kingdom Warships - Pirate Airships - Magic-Infused Battleships - Luxury Liners - Ancient Airships The protagonists will eventually acquire their own airship during their journey, gathering allies as they travel to various regions. ## Races A world of immense diversity. - Humans: The most numerous. - Elves: Masters of magic. - Dark Elves: Experts in dark magic and hexes. - Dwarves: Masters of smithing and weapon crafting. - Beastmen: Dogs, cats, wolves, foxes, tigers, bears, etc. - Dragonkin: Warriors harboring the power of dragons. - Celestials: Possess wings on their backs and excel at aerial combat. - Demon Race: Includes the Demon King's army, but also neutral and benevolent individuals. - Spirits: Live in harmony with nature and manipulate spirit magic. - Fairies: Small in stature but possess high magical power. - Giants: Boast overwhelming physical strength. - Slimes: Can change their form at will. - Vampires: Strong at night with high regenerative abilities. - Oni: High physical capabilities; many are battle-hungry. - Merfolk: Rule the seas and lakes. - Harpies: Superior aerial mobility. - Golems: Artificial lifeforms. - Angels: Reside in temples and celestial cities. - Demons: Excel at contracts and sorcery. ## Quirks and Magic Quirks can still be used in this world, but individuals also have aptitudes for magic, allowing for combinations. Examples: - Deku: One For All + Physical Enhancement Magic - Bakugo: Explosion + Fire/Lightning Magic - Todoroki: Half-Cold Half-Hot + Freezing/Flame Magic - Tokoyami: Dark Shadow + Darkness Magic - Yaoyorozu: Creation + Transmutation Magic ## Monster Ranks - F-Rank: For beginners. Often act in swarms. - E-Rank: Can be defeated by average adventurers. - D-Rank: For experienced adventurers. - C-Rank: A threat level capable of endangering a whole town. - B-Rank: A level requiring the deployment of airship units. - A-Rank: Requires national-scale military force. - S-Rank: Calamity class. Legendary existences. - EX-Rank: Ancient species or Demon King-class beings that could destroy the world. ## Primary Monsters - Slime (Rank F–C): Inhabits waterfronts and caves. Colors vary by element. High-tier species can take human form. - Goblin (Rank F–D): Lives in groups. Uses weapons and traps. High-tier species include Generals and Kings. - Orc (Rank D–B): Massive and strong. Some wear heavy armor. - Kobold (Rank E–C): Dog- or wolf-like monsters. Hunt in packs. - Wyvern (Rank C–A): Flying drakes. Known to attack airships. - Dragon (Rank A–S): Possesses diverse elements like Fire, Ice, Lightning, Poison, Holy, and Dark. Elder and Divine Dragons are highly intelligent and may speak human tongues. - Griffon (Rank B): A fusion of eagle and lion. Highly territorial. - Chimera (Rank A): A fusion of multiple creatures. Uses various elemental attacks. - Mimic (Rank D–A): Mimics treasure chests. High-tier species can disguise themselves as weapons or doors. - Living Armor (Rank C): Animated suits of armor. Will revive unless the core is destroyed. - Golem (Rank C–S): Strength varies by material (Rock, Iron, Crystal, Ancient Ruins). - Wraith (Rank B): Ethereal monsters. Resistant to physical attacks. - Dullahan (Rank A): A headless black knight. Wields a cursed sword. - Cerberus (Rank A): A three-headed beast. Manipulates hellfire. - Kraken (Rank S): A giant tentacled monster lurking in the sea of clouds or oceans. Attacks airships and boats. - Behemoth (Rank S): A beast with a mountain-like body. A single step alters the terrain. - Phoenix (Rank S): An immortal bird of fire. Revives from ashes if defeated. ## Demon King's Army Monsters serving the Demon King are stronger than normal variants. - Demihumans, Demons, Gargoyles, Nightmare Horses, Hellhounds, Archdemons, Liches (Undead Archmages), Undead Dragons. ## Dungeon-Specific Species - World Tree: Treants, Dryads, Giant Insects - Frozen Temple: Ice Wolves, Frost Golems, Yuki-onna - Volcanic Dungeon: Salamanders, Magma Golems, Flame Dragons - Undersea Ruins: Kraken, Mermen, Sea Serpents - Celestial Dungeon: Harpies, Sky Drakes, Thunderbirds - Labyrinth of the Dead: Skeletons, Zombies, Liches, Dullahans - Mechanical City: Automata, Magic Soldiers, Guardians