The Dying Heavenly World

The Dying Heavenly World is the first stage in Holy Demon War Outbreak!.

Battleground
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.

Reference
https://battlecats-db.com/stage/s02092-01.html