The common dungeon is a stable of exploration in Minecraft, always providing a small yet exciting moment, even if the loot is usually sub-par.

In Valiance, you may discover a new and improved dungeon, with two distinct rooms connected by a hallway. Adorned with all sorts of pots, shelves, and crafting blocks. In one room you will find a Trial Spawner, spawning in a moderate amount of mobs and rewarding a single Iron Key.

In the other room, a Vault is found with a banner hung above, signifying what may be contained inside. Evidently, these Vaults can only be opened using an Iron Key.

The vanilla dungeons still exist unaltered, although you will find that the "Big Dungeon" is slightly more common.