ULTRA HARDCORE (vanilla friendly) by YANLALEGGENDA17
The goal is to immerse you in a world that encourages exploration, and you're also rewarded for it, but not without a lot of effort and hard work to get what you're looking for. There are several elements that aim to make the gameplay more immersive with various graphic effects, customization elements, and QOL features. The main mods I like to base my gameplay on are TETRA (also with addons) and CREATE (also with addons), not to mention all the new bosses of the CATACLYMS. There are also some fairly well-known but not annoying horror mods like Cave Dweller and the like. To give you a few names, we have: From the Fog (Herobrine), Eyes in the Dark, and another that adds many scary enderman variations. Creativity and ingenuity are your best allies, make good use of them!