Dungeon Lords: Festival Season is a big expansion that includes lots of Dungeon Lording goodness.
The game is still played over two years, but now each year has five rounds instead of four: winter, spring, summer, autumn and festival season. More time to build your dungeon, but also more time for adventurers to gather a larger party. There are new monsters, rooms, and traps to prepare your dungeon for the battle, but also new nasty spells for the adventurers and sneaky bards who encourage them to perform so-called "heroic" deeds – not to mention two paladins for each year, now ready to punish up to two evil players.