Villagers in the Nether

Unique villagers for nether biomes. Villagers and villages would not automatically spawn in the nether. Instead, the player would have to build villages and encourage villagers to move in. Villagers in the nether would offer better items for trading, such as ancient debris or netherite ingots, or maybe even full netherite tools, as well as other nether items. Instead of iron golems, you could build obsidian golems. Obsidian golems would be made from a T of obsidian, with a piece of crying obsidian in the center, and a pumpkin on top. Obsidian golems would be much stronger than iron golems. All nether mobs would be hostile to villagers, so defending your village would be harder.

You can already build your own villages, and villagers will treat them like normal villages, but there isn't much incentive to do so. This would add some, because you could get better trades.