Dark Chest

The Dark Chest is only obtainable by giving a Dark Potion to a Pirate. This drop is itself incredibly rare, and the chest typically yields Dark Mushrooms or Seeds, with a rare chance (1/25) of getting a Dark Orb, capable of turning diamonds into Dark Diamonds. Some have hypothesized, however, that the Dark Chest has a 1/60 drop yielding the Loot Bag containing the Mouse Coin.