Redstone Key

The Redstone Key is a dungeon item that you can obtain by right-clicking on it when finding it on a shelf. It appears as a red skull.

The only use for a redstone key is to place it on a redstone node, usually found in the same room as the key, after which it will open a redstone door, also found in the same room as the key.

As of 9/7/20, only two rooms utilize the Redstone key for secrets. They are both 1x1 and both contain 3 secrets, however, one of the rooms is glitched to only show that it has 1 secret.