Lords of the Fallen has an abundance of shortcuts to find throughout its vast and densely-packed levels, but they’re often locked behind doors that require you to round up specific keys to unlock them. Such is the case with the Sunless Skein Key, which you won’t be able to find until pretty far into your adventure. As a matter of fact, it’s probable that you’ll come across a door asking for this key well before you actually find it. Luckily, Lords of the Fallen’s interconnected world means you’ll almost certainly come back across those doors later in your journey anyway. When you’re ready to seek out and add the Sunless Skein Key to your key ring, check below for everything you need to know.