Writing DIGIMON: The dark waters

[Blastmon]

Prologue

A long time ago there was a huge battle between armor digimon and Dark digimon. Both races wanted to rule Eld island.
The leader of the armour digimon was Magnamon, and Myotismon was leader of the dark digimon.

When the battle had begun the dark digimon were easily winning.
But then Magnamon used his magna explosion to destroy all the dark digimon apart from Myotismon.
So myotismon raised his hands into the air and reached for the sky and used an acient dark spell.
"I call upon the darkness which was destroyed to come back and help the dark grow strong, sink this island under the sea and keep it their for eternity!"
Then a huge dark cloud swept over the island and a bolt of lightning hit it. A whirlpool came from underneath the island and the island slowly went under the water, as it happened Myotismon tried to flee but Magnamon would not let him go so all the armour Digimon and Myotismon sank beneath the water and died. The water that was in the islands place was now black.

[Sheikahmon]

Brr... cool start. What happens next?