Update to the Polar Bear and Polar Bear with combat armor

The polar bear looks little intimidating, I propose that they should remake their model while preserving the current aesthetic, but making it bigger and thus a more striking mob. In addition it would be good to add a new variant, this would be a new polar bear that has armor; This mob would be exclusive to the glacier biome and one would be generated per game. Its appearance point would be a scene like the remains of a battle with banners and rubble and in this area only this mob would be generated. The usefulness of this polar bear is that it could be mounted, it would have a lot of life and an attack could be made to the hostile mobs in an area of 8 blocks, to make this attack the bear would stomp with the front legs and it would take a while to reload the attack.