Hellforge

it's like a furnace but made with netherbrick instead of cobblestone but it can only smelt iron and netherbrick.

also: gives 64 pocket sand every tick to all players to make sure they are well equiped.

if put in the nether, it will squeal because it is excited to be home. if placed in the overworld it will cry because it is sad. if placed in the end, it will become a hostile beast that has a name that can never be said and will attack you.

also: will scream if you have pocket sand in your inventory