The Story
The Island of Imerlenat has been under an oppressive, cursed state for years. Reason? Simple: The islanders angered an evil goddess of the sea.
At least that's what they were led to believe.
In truth, their oppressor was not the goddess or any other deity. It was a sinister trio of hags, a Hag Coven. Their leader, a sea hag by the name of Granny Tangletoe, lived in some caves under the island.
The party managed to find her location. While the hag was only aware that some kind of scrying was done on her, she would take no chances. With the wisdom of centuries, the Hag had no intention of a show-down, especially considering how weak she is in direct combat.
Instead, she would lure the party into her maze, dividing them and letting the maze do its job. Should they survive, she had multiple escape plans.
The Map
The map, in the general sense, is mostly self-explanatory. It's a maze in the caves under an island with slightly different terrain features.
I'll explain a few points about how things will work in my game. Feel free to use and edit it however you like.
The "mushrooms rings" are the starting points, each player starting in a different one. The ones without players have allies of the final boss.
The "dark room" looks like a cave entrance. Honestly, that was unintentional. I meant to make it a room that gets impossibly dark. A pack of Shadow Mastiff resides in there.
The crystal room is related to an NPC the party meets before the engagement: A mage from another world that draws on power from these crystals. Unfortunately, these are drained but there is one crystal left with power in hag's room.
The big room in the middle is where the hag is. There is no direct path to it from the points I designated as starting points, guaranteeing some time in the maze even with the best choices.
In the room before the hag stands the actual "boss fight." For me, it was a pretty powerful Winter Eladrin that the hag forced into service.
The Hag will directly face them when they enter the room and start talking. She'll accept that she has no chance. She'll be "just gardening" and if the party pusher her, she'll kindly ask them to let her be finished with the last flowers. If pushed more, she'll tell them she has important information and will do her best to talk her way around the subject and buy time. If pushed more, she will give away some information, starting from the least important ones.
She's actually just buying time to trim some flowers in the right way to allow her to teleport outside.
In fact, the mushroom rings are actually just decoys. They are the "popular thing" people hear about and serve as a distraction. It's the weedy looking flowers that are actually magical, and they are placed as a hexagon around each "mushroom ring". The magic circles drawn under the rings also have no use.
There is a very weak stream of water running in the bottom side of the caverns.
The three chairs in the Hag's area are for the Coven that the hag's part of. The orange things are amber covered human bodies that belong to a temple in the island.
Finally, I placed some "titan faces" that are almost impossible to perceive. I think they are creepy, I'm curious if the players will notice them! Feel free to make them more or less visible.
PS: Top left corner is reference to arrange grid and get a sense of size.