Diablo 4 players exploring the vast world of Sanctuary will find a variety of chests to open. The most common chests require nothing more than a button press for access. Other types, such as the Resplendent Guardian Chests, may first task users with defeating an Elite enemy. Then there are those of the Mutterlock variety, which are one of the unique puzzles that you can stumble upon in Season of the Malignant. For Diablo 4 players confused about how to find and open Mutterlock Chests, here’s a rundown on what to do when stumbling across one.

Mutterlock Chests are extremely rare chests that can be found in Nightmare Dungeons in Diablo 4. They are easy enough to identify, standing out courtesy of the golden chains and lock that keep them closed. You won’t need a specific key to open them. Instead, these objects will ask you to solve a puzzle to unlock them. The correct phrase unseals the Resplendent Chest so you can open it, while the others will make it disappear into thin air. So, how do you know the correct phrase to pick?

Players should first scour any nearby rooms in search of three stone inscriptions – Birth, Life, and Death. Clicking on a stone will reveal the following line of text: “The markings are illegible, but a whisper is heard.” A disembodied voice should then whisper the corresponding phrase.

After finding all three inscriptions, Diablo 4 players must return to the Mutterlock Chest, then click on the phrases they saw in the correct order – whichever words were respectively assigned to Birth, Life, and Death. Once unlocked, the chest should transform into a Resplendent Chest, revealing whatever bounty awaits. These chests usually drop Sacred or Ancestral D4 Items that can be the key to getting your best character build or to defeat one of the many bosses in the Diablo 4 endgame.

The Mutterlock Chest acts as the rarest chest in D4. Their high rarity means they show up at random, too. Even returning several times to a dungeon that previously played host to such a chest won’t guarantee its reappearance. As such, users who find one should at least try getting it open before continuing with their adventure.