Ancient update idea, the caveman

The idea is a new mob similar to villagers, the caveman. They will have a smaller forehead, smaller nose and wear a tattered cloth coat reaching to their knees. They can be found in ice spikes and you have to thaw them out. You can find 5 "biome" types, cold ocean, warm ocean, below sea level, below hight level 0, and one that is its natural varrient similar to how plains villagers are. This is because of the water ruins, trail ruins, and ancient cities. They will be scared of fire similar to how piglins are scared of soul fire and creepers. They can sell you long forgotten things but with a different currency than emeralds. They will sell you items like copper tools, this will be the only way to get them. They will make pottery shards if you give them clay. They will give forgotten enchants known to modern enchantment tables, a battle hammer that can't be crafted. And more things forgotten to time.