The Invincible Tower Master

Earth is thrust into a multiverse survival game where a lord’s fate decides their nation’s survival. With the Dragon Kingdom facing total collapse after three straight defeats, Li Sen enters the fray. Cursed to lose power with every soldier he recruits, but gifted with a 100x tower defense buff, he abandons standard armies. Armed only with a barren wasteland and a summoned SSS Succubus hero, can his ultimate defense fortress save his dying homeland?