Incendium

About

Incendium is a Minecraft datapack designed to completely overhaul the Nether using only vanilla blocks. In addition to extending the Nether's generation height to 192, Incendium adds 8 all-new biomes and 9 new structures with new custom mobs, items, and advancements. Terrain is also overhauled, with jagged mountains, twisting caves, and much more.

Source: IGDB