Ich fresse für mein Reich

A paralyzed modern man, Liam, transmigrates into a powerless lord hated by his people. On the brink of an orc attack, he binds with an evolution system—swallowing poison and rotting plants to manifest grain and forge a fortress overnight using modern knowledge. He repels the orcs, but they vow to return in three days with magic-acid beasts. With no magic defense and the elves blocking all technology, Liam smirks and declares: "We'll steal it."