Once the site of a great civilisation, now only the peaks of long fallen ruins remain above the sludge; thick grot drags at your feet, sapping at your will, threatening to drown those who do not traverse with care. The mud gets everywhere, wounds become infected with ease, and torches sputter in the damp miasma of the air. Dense clouds rise to blot out the very sun. 

Thick trunked trees—long ago petrified— block sightlines, not by proximity to each other, but by their sheer numbers and size. Their canopies are long dead and snap easily, making them no choice for traversal.

Lost somewhere in this treacherous bog is all that remains of Sarkay Keep. Rumour holds that it will one day rise again, dredging from the muck things long unseen.

What is This

Firstly, this is for any GM who, like Miyazaki himself, loves to make poisonous swamps and just cannot help themselves. 

Secondly, this is a region to be placed within any map that needs a poison swamp. If placed upon a hex map, the hexes are not required for traversal and only indicate the space it occupies. The space this region occupies is unmapped and mysterious. It is also slow to traverse, so need not take up much room.

Lastly, this is built upon the procedure laid out in the post Flux Space by Nick LS Whelan and requires the rules presented therein.