[quote=@Kho]
I would say sinking it ALL is a bit extreme. Send a tsunami, sink a few islands, but the archipelago in all its entirety? Even Poseidon didn't sink the world when he got angry, he just sunk Atlantis (a teeny island)
[/quote]

And most Gods of Chaos didn't plunge the world in terrible darkness because they could. 

Kraken and Vestec have to keep the rest of them on their toes somehow.