Just in case you want to know ^^

Edit: GUYS, please don't be mean to those who didn't know...

DREDGEtober #18 - "Archipelago"

In deep, and sunlight ocean water waits a towering forest of kelp. Sharks weave through swaying weeds, and thick fronds hide shy undersea creatures and monstrous beasts. Rippling shadows make it difficult to see, and the long strands can easily tangle unwary swimmers. If you dive deep enough you may also find a dark trench (that will absolutely not hide anything which could swim up and eat you in one bite) ;)

Apakouma Mountains: The mountains of the once great island of Apakouma have always been known for their belching mountains of fire, most of which are far too small to do any real damage. For years before the breach, the island people gave praise to a great fire bird that was supposedly born out of the volcanic mounts every thousand years.

The Breach: The Island of Apakouma was once a thriving metropolis, a collectivist paradise that existed outside the fueds of the rising city states of the mainland. That came crashing down when a mage conjured the breach. The occurrence itself is still surrounded in mystery, but supposedly by purpose or accident, a mage summoned forth a mighty being of ancient myth to try and claim its power. The summoning destroyed massive parts of the island, and though it is said the beast was defeated, the breach through which it appeared still consumes both the remnants of the island, and any too foolish to wander near. None knows where it goes, for none have ever returned. This is a great are to modify it from a mage to a cult if you want to run the Dragon Queen adventures from 5e (Dragon Queen’s Hoarde and Rise of Tiamat) otherwise you can make the being anything you want, personally I prefer a Kraken. You can even redesign the island to what it may have been like before the breach, build your own society around it. Either way, the Breach is a very flexible part of the landscape, maybe your heroes even prevent it from coming about.

Breachwatch: Breachwatch is a very small town made up of volunteer mages, their families, and various soldiers who monitor the breach and the magical energy that pulses around it for abnormalities, as well as how it affects the local fauna and mutates them into monstrosities.