It certainly can be made as a realm selection with some tweaked settings.
It would be fun to have such challenge, people will be quite careful when playing, not just "Leeroy jenkins-ing" everything š
I currently play at a private server that has it. Its very intresting and a very nice challange for those brave enough to accept said challange.
Rules:
ā¢ This decision is irreversible. Your bags, bank and mail items will be erased once you turn mortal.
ā¢ When your character dies, the game ends for you. If you choose to create and play a hardcore character, you do so at your own risk: we will not restore any deceased hardcore characters for any reason including connection problems, bugs, global warming, your little sister, or any other reason whatsoever.
ā¢ Dead characters will remain locked on a selection screen unavailable for playing. As long as you donāt delete them, characters above level 10 will be displayed on our scoreboard.
ā¢ You will be able to trade items and gold only with other Hardcore characters as long as the difference between your levels isnāt higher than 5.
ā¢ You will be able to group up only with other Hardcore characters as long as the difference between your levels isnāt higher than 5.
ā¢ Hardcore characters can not trade, nor buy on Auction House.
ā¢ Hardcore characters can use mail, but with no attachments.
Rewards
At max level you will be awarded with the title āImmortalā, unique tabard and a mount.