I think it would be cool if there was a colosseum with endless waves. Every fifth stage is a boss and increases in difficulty and even incorporates the stage types (posion, fog, etc). The farther you go, the better the loot! Another variation might be to have one at the end of each world map that allows you to attempt to beat every stage in the map consecutively with loot tiers based on how far you make it.
2 posts were merged into an existing topic: Survival Mode - Master Thread