Thousands of Armies from Another World's Sacrifice Song

Thousands of armies must be sacrificed in exchange for the coming of the king! Lawrence, a little engineer in his previous life, when he awakens in the flames of war and blood, his enemies will be annihilated under the iron hooves of his Demon Pig Heavy Cavalry, and his enemies will tremble in front of his biochemical druid troops! This man will definitely become the savior!