The Dying Heavenly World is the first stage in Holy Demon War Outbreak!.
Some Doges and Snaches spawn slowly at the start. They stop after a while. When the enemy base is at 90%, the boss, Magical Nero, spawns. Doges and Snaches will start spawning again, even slower than before. The Snaches will stop spawning after a while, however the Doges spawn forever.