Challenge Arena Gamemode (Minecraft Dungeons)

There is an arena Gamemode where you have to fight off hordes of mobs with yourself or with friends. it detects the level you are at and makes it a challenge for your specific level. there is a trader, so in-between each wave, the trader can sell items to help you like potions and healing. it works with the dlc map themes also, and there is easy, medium, and hard where the arena gets smaller the harder you set it at. there is endless waves, and each wave gets harder. For every couple of waves there is a boss creature, and you get rewards like tools and artifacts and emeralds the more waves you go through. which would keep the player busy. I think this is good for the game because it adds more playability and has the option for endgame players as well if they want a challenge, because playing Hard on Apocolypse+ in this gamemode would be deadly for even the strongest of players.