How do you get a dungeon key? I can't seem to find any, am I just not going far enough into the dungeons yet?
these are some ways to get keys that I know of:
1. The Keymaster. He can be found in the castle dungeon(east of spawn, near the ravine). He spawns as one of the possible NPCs that spawn when entering the dungeon. He can also be found in the 'regular' dungeon South of spawn.
2. They might drop as rewards for defeating some enemies in dungeons(not sure if this applies to all dungeons or if it is even true).
3. It has a chance of dropping when opening chests(not for the golden chests) or pushing over barrels.
Those are the methods I know of.