What is it ?

The dead sea is a Mcreator mod with a creepy and dark atmosphere, as it adds a whole new nightmarish dimension for the player to find.
This mod's dimension houses a couple of biomes (between 3 or 4 depending on the version you're playing in) which all have a few scary mobs and plenty of blocks.

What does it offer ?

A new dimension to explore and get lost in, which will make you feel fear the deeper you go.
Its progression is pretty straightforward, as it is told to you straight up once joining the dimension with the - key on your keyboard.
What I love about this mod are the details ; while the music seems to be a pretty generic royalty-free dark ambience which only plays once after joining the dimension for the first time, most biomes have a surprising amount of visual details (with the exception of one being the desert as it is pretty barren) - or at least surprising for a Mcreator mod on the older side : from the branches in the trees of the forgotten forest to the various scattered cars in the city of ashes , this mod knows how to render various basic environments more interesting;
Same goes for the creatures you'll find : while still often having simple or vanilla sound effects they do have detailled textures and models , and while they lack custom animation, they are good enough to benefit the immersion factor of this realm.

Unfortunately this mod appears to be discontinued , which means unless I stand corrected it won't receive any new biome, entity or other features; this is quite a shame as this mod seems to have some great potential and I would have loved it even more if it had more going on in terms of content or gameplay elements. Some of the mobs in the mod can also be quite loud at times and their sounds seem to linger for a bit no matter how far you run away, I would therefore suggest keeping the hostile mobs/master volume down for this one.
This mod also lacks a config file, which means you can't really tweak anything.

In conclusion

The dead sea succeeds in being a terrifying dimension to be trapped in, and while this mod is without any surprise not an absolute good-tier one, it certainly has its place among the list of one-off mods to play in the dark on October 31st while having your windows closed.
I would like to precise here that is recommended by the mod itself to play it alongside Optifine or a mod which adds some form of dynamic lighting, as navigating the dimension with absolute darkness can be pretty tedious.