Fortress Royale: Infinite Shelter Upgrades

At the doomsday shelter card-draw, Leon pulled only a despised, useless ordinary water tower! Little did anyone know he had already awakened the divine skill [Hand of God], fusing defense towers into a floating undead fortress! But the moment his power awakened, a terrifying truth struck: the apocalypse was never a game—the system created all lords only to slaughter and sacrifice them one by one!