Reborn as the Last Card Sovereign

Kairo Venn awakens at Level 1 on the cracked pavement of a ruined city, surrounded by shattered towers and enormous claw marks. A goddess explains that he has been reincarnated into a world destroyed by Echo Beasts, creatures summoned through tactical card battles. She gives him a Hex Bracer and a 20-card starter deck, then vanishes before answering how he can return home. Every Night Duel begins when both duelists raise their Hex Bracers and say, “By shadow, reveal the field!” The arena then forms, each duelist starts with 4,000 Vitality Marks, and combat proceeds in strict turns. When a duelist reaches zero, darkness absorbs them and the winner claims their strongest card. Summoned creatures physically appear, but they obey the turn-based battle rules. Kairo’s ten starting creatures have no special abilities and fight only with Power and Guard. His deck contains one copy each of Eclipse Arcanist, Moonlit Hexer, Veilbound Apprentice, Runic Conduit, Robe Warden, Glyph Adept, Riftblade Adept, Ashen Seer, Graveglass Witch, and Wraithbreaker; Greedwell Chalice, Recall from Beyond, Voidfall, Blinding Radiance, and Convergence Rite; Prism Reversal, Binding Sigil, Severed Light, Pulse Exchange, and Denial Step. The world’s fusion rules must be established before Convergence Rite can create a fused creature. Kairo possesses Fate Pull, an ability that provides the exact card he needs only at a true turning point. It cannot be chosen freely, and it never guarantees victory. He must survive ordinary draws, master the rules, uncover what unleashed the Echo Beasts, and learn why defeated duelists vanish into the consuming dark. His ace and central partner is Eclipse Arcanist, whose reveal anchors the opening Night Duel.