while picking up a precious snowflake you have a chance to create a SNOWMAN'S DUNGEON, its a 150% version of igloo with war-flag on top
snowman are essentially a snowman's with different store hats on them just to make it more fun, beside snowman's you can also fight penguins with tall hats and monocles and reindeer's with red noses, maybe white bears too
I will let you figure out the boss at the end but make it funny
the point is, game does not always have to be dead serious, Ive heard a rumor that you both played diablo2 so relate this idea with cow level, make it festive and loot-rich but also difficult( ... wait.... snowman's with b-12 ? ... ) , perhaps bat dungeon difficult, but then again don't make it as miserable loot-wise, yes, dungeons are pathetic in terms of rewards and you could work on that on the side but this is not what the post is about.