cold fossils

with the way the basalt creation mechanic works being lava and ice put together make basalt the existence of basalt in the nether, let alone an entire biome worth of the stuff implies 1 of 2 things that either 1 the nether was originally a cold place full of ice or 2 that  stupid amounts of ice was moved into the hot nether at some point but because ice melts in the hot nether this means that the nether was in fact originally a cold place that being said my proposal is to include a nether variant of the teased archeology feature in which you can find  cold relics buried in the nether predating the piglinsa and nether fortresses and hinting out new lore whilst leaving it open ended, maybe even a new type of weapon or a block that can craft netherite into more things (end game applicable) of the calibre of like a beacon or elytra, or maybe a portal back to this cold world in which you have to start anew with no items, completely new mobs items crafting recipes items and game mechanics, new structures and a new boss that once defeated will open up the way back to your pre cold nether world creating more endgame content for after the ender dragon is defeated.