New mob that leads you to ancient ruins if you feed it jingleberries

So I think that there should be a new mob, like a monkey, or a Phoenix that you feed the new jingleberries in the new cave, and the new mob will lead you to ancient ruins, which are almost impossible to find without the new mob. The mob will pause frequently waiting for you to feed them more jingleberries. And if the player tries to trap the mob because they Ran out of jingleberries or something, they will DeShawn. The ancient ruins will be a large maze with incredible treasure at the end. I personally think iron or diamond Armour, saddles, diamonds and emeralds, horse armour, tools, and more good items.