Now, reading the title of the thread, you may be wondering why anyone would need to exchange emeralds for bricks, since gear in the emerald shop is better than gear in the brick shop. Well, some items in the brick shop, such as arrows and building blocks (other than obsidian) are needed late-game, namely after cake rot. Personally, I mainly buy iron gear until cake rot, so I can save my emeralds to purchase diamond armor once I can no longer respawn. Anyways, I always find myself short on bricks near the end, so I can't buy more arrows for combat. Since there is already a feature that allows players to exchange 20 bricks for 1 emerald, I think it'd be helpful to add one in the emerald shop to exchange 1 emerald for 20 bricks! That way, players won't be stuck waiting at their islands for more bricks to spawn in their generators after cake rot. Unlike emeralds, the amount of bricks generated can't be increased by capturing beacons, so I just think adding a way to get them from emeralds would be neat.