You can pay 2 and remove 1 Fire, 1 Wind, 1 Earth and 1 Water Character in your Break Zone from the game (instead of paying the CP cost) to cast Darkness Manifest.
At the beginning of Main Phase 1 during each of your turns, Darkness Manifest deals your opponent 1 point of damage.
When Darkness Manifest leaves the field, choose 1 Character. Break it.