Isla de la luna de Muertos
Said to be the heart of all evil in the Caribbean, this deadly island has been inhabited by Jolly Roger's vile minions and Blackbeard's cursed slaves. The island has been cursed so that every night, the Muertos moon appears and transforms any unlucky (or lucky) adventurer into a zombie. They have to fend for themselves until morning or repeatedly die painful deaths until morning (kinda like PvP and the curse of the Muertos moon).
The island is in ruins and used to be inhabited by peaceful French sugar farmers with very few pirates among them. There are many forests with squirrels (now rabid and gigantic because of Jolly), birds (basically same as the squirrels), and hogs that often try to ram unwanted visitors. A network of underground caves are also found because the two undead armies (skeletons and zombies) are trying to hide and fight each other constantly to win over the power of this island.
The "power" of this island is really the rest of the power that came from the gypsy that cursed Jolly. When the gypsy died, he had part of his soul tied to this island (his home) and only half of his power went to Jolly (otherwise he couldn't be beaten). Whoever has possession of this island after his death, has possession of the entire Caribbean's voodoo power. The gypsy was also the God of all Power and held authority over voodoo, and all other mystical, unworldly powers.
There are two large cave systems that either have Zombies or undead skeletons. Kinda like SvS, if you are killed in one of the caves, you must choose whether to serve for that side's army in a "battle", or hope that a friend saves you or you go to the crumbling prison on the island. There is a hidden cove that was protected by Tia Dalma as she fled to Cuba, so there are a few merchants and shops and shipwrights around a little town square beside a small, wooden Navy fort (called Fort Henry xD. real place). In this safe area, no one is affected by the moon.
Hope you guys like it! Took a while to write.
Congrats in advance to whoever wins.