Locked chests in the dungeon: where to find the keys and what to expect inside?

The 1.2 update added some new locked chests to the dungeon. Where can I find their matching keys and what can I expect to find inside these chests? Are the rewards unique? Will I need to generate many worlds to get all significant rewards from these chests?

2 Answers

All of the rewards, except for those from Golden Chests, are unique to the dungeon.

All of the dungeon keys are acquired by combining a random drop from the respective hardmode biome with a Temple Key and 5 souls of Sight (Twins), Might (Destroyer) and Fright (Skeletron Prime).

In addition to these main rewards, all chests also contain some other items such as potions, explosives, materials, coins and lighting equipment.

Acquiring a Golden Key:

Finding one in an unlocked, normal Chest in the Dungeon
Finding one in an unlocked, Living Wood Chest inside a Living Tree.
Killing a Dungeon Slime
Killing another Dungeon monster (1/67 chance)
Breaking a pot in the Dungeon (1/40 chance)

Sources:
My own dungeon delving
Terraria Wiki
Source code of the game

8

The key molds drop from mobs in that biome but in the ocean you can get any mold. I got the hallowed and Ice mold from beating lepus(the Easter boss) in those biomes after he spawned loads of disaster bunny's.after getting a mold you need 5 souls of fright,sight and might to craft a key.

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