Frosters and more elemental/dimentional mobs

There’s striders in the nether, so why not add ice mobs? The Froster is one example. Traveling on ice or water with a boat is really fun and fast, but whenever I ride a bamboo raft (or any other type of boat, personally I prefer bamboo or cherry) onto the ice, I get dizzy and sick. So since we have the strider in the nether, we can have an identical mob named the Froster, who walks on ice and water super fast but not dizzy and weird like on a boat. You would have to use a new fungus named the Frosternus and put it on a stick aka fishing rod and make a new idea called the Frosternus on a Stick. You can ride the Froster with a saddle and a Frosternus on a Stick. Also, this will also introduce a new biome named the Frostlands and a new type of wood and even more new mobs and blocks. You can bone-meal a Frosternus on the ground and it will turn into a Frosternus Tree. You can only do this on rooted dirt or coarse dirt. That’s why there’s a new biome for that: The Frosternus Biome. You can harvest the Frosternus Trees and make them into different wood things like slabs and planks. But this tree is similar to a pale oak tree but also different: there’s mobs named the Frosterlings that would spawn during dawn and disappear during dusk. They would be a neutral mob that would attack you once provoked. The Frosterlings drop something named Frosterite that you can use to craft the strongest armor ever. To conquer the Frostlands, you must defeat the Frostlord who is guarding it.