Hello, everybody so I recently thought again about an infinite arena with some boss stage every 10 or 15 waves done (since there's no more limits in the number of depths we can do per day). We would get the usual stuffs that the monsters drop and maybe some krogmo coin every boss killed (1 or 2) (yeah i'm not really into pvp) and those who have the expansion would be able to fight seerus too. Traps and spawners could appears on some waves when you defeated the first boss would be logic so that you don't have to be carefull at the beginning. I thought about putting the shadow lair's bosses in too but only when you get really far in the arena (like wave 100 you get to fight the rabids snarbolax). I don't really have a clear idea of what it would look like but tell me if the idea seems nice to you.
PS : sorry about my bad english, i'm french :s
Nice idea. I would really like to have that in the game. Here is a link to a post that is very similar to your that you might want tot take a look at: