Magnet items

ok, so I think there needs to be some way of connecting minecarts kind of like a roller coaster. So my idea is the magnet block. my idea for crafting it is kind of expensive and rare but u would need to mine a new ore called magnet ore. it drops 1 magnet nugget which can be crafted into magnet ingots. these could be crafted into said magnet block or magnet tools and armor. When wearing the full set of the magnet armor any iron items that mobs have will be pulled to the players inventory. the ingots could also be crafted into a ore compass. this could be too op so it might not be expectable but its an idea. it will point to any ores around you. the magnet pickaxe will highlight any iron around u. the magnet sword will basically pull the iron out of the enemies body so this could have its own animation or whenever u kill a mob it drops a iron nugget. and back to the magnet block. combined with a minecart it can be a minecart with magnet block. placing multiple of them on a track next together will create a kind of roller coaster. i would love if u could put this in 1.17 if not 1.18. 

Thanks.