I dont know if this is already planned but is there any uber levels or areas that you can only enter throgh opening a portal ? Similar to cow level but literally like opening a scroll of town portal it could be pretty good concept! Imagine if it had similarity to the Uber Tristram in diablo where your constantly swarmed with monsters all the time and its something similar to "The Crucible" in Darksiders game where after each wave you meet Bosses (enhanced version of underlings from the same wave level 1 meet thy ultimate Fallen One Boss
) and each time its ups the difficulty is a level literally designed to kill you but at the highest waves u could meet all types of monsters from all ubers kinda like the Chaos season but in this case they literally pop out of nowhere
from the Darkness of Rathma's condemned soul or somethin
I like it when there are like challanges where they require you to survive in order to gain something (AKA Bremtown upgrade) for example if u leave with a portal to town the whole level gets reset to square zero and wave zero or the next time you visit the area the monsters are super duper buffed for punishment because you left to restock or or whatever the character had to do etc
to survive. The level itself could be called something like... The Endless pit or The Tower of Heaven or something
it doesnt have to be a big area in fact it could be multiple levels with portals interconnecting them one of the areas could be super tight and it could be swarmed with Polar Worms or something o.O the other could be a narrow hallway filled with necrobots and necrobombs etc there are a lot of ways to trap a player in a sticky situation and block it from going to the upper levels