As of now in DDA, after you’ve properly established yourself, survival is trivial.
Now, Whales’ left all of this nice material for another world, with goo, flaming eyeballs and other-such fun creatures.
I wonder what would happen if every day, a portal emerged, from which otherworldly creatures appeared.
What if there were a way to close these, albeit a risky one?
Also, another separate idea, a game-mode like that of an old mod.
An ever-present horde marches towards you to the east, you must keep moving and never stop.