Read Only I Have An Ex Grade Summon manhwa in English where modern survivors battle inside a tower system. After waking from a three-year coma, Kim Ji-nu discovers a dangerous gaming reality. Tower challengers desperately seek a mysterious deity named God Ji-nu to survive. Ji-nu realizes this legendary figure is actually his old gaming avatar. Now, this former gamer utilizes unique ex-grade summons against monstrous enemies. He uncovers a corporate conspiracy regarding the sudden real-world portal awakening. Ji-nu is summoning powerful legendary beasts while conquering dangerous higher floors.