It may sound strange, but i thought of an idea for enchanted minecarts? They seem to be pretty basic and i think it would be something that Minecraft would have. Such as like maybe an enchantment for how many cars are on it or like a lightweight one where it could do jumps and maybe a connected one where its connected to the track and maybe you could do something with rails and have them be able to go on walls or something? Make a cool loop thingy or something? I thought a thing like that could be really cool