If you are running a frost build on your Sorcerer, chances are you have heard about the Aspect of Biting Cold. It is one of those upgrades that can really change how your build feels in combat. The only guaranteed way to get it is by clearing the Forgotten Ruins dungeon, tucked away in Kehjistan. You will want to start your trip from somewhere close, and if you have the Iron Wolves Encampment waypoint unlocked, that is perfect. From there, ride west along the coastline and you will eventually spot the entrance. It is hard to miss – a sandy ruin that fits the region’s style. By the way, if you are looking to boost your gear before heading in, check out Diablo 4 Items for some handy upgrades.

Once you step inside, your first task is simple: clear out the Tainted Corridors. It is basically a sweep-and-clear job, but do not rush it. The place is crawling with skeletons, ghouls, and other undead. Nothing too dangerous on their own, but they can pile up quickly if you are not paying attention. The tricky part is making sure you do not miss any enemies hiding in corners or stuck behind objects, because the game will not let you move on until every last one is gone. It is worth checking your map often to avoid backtracking later.

When you have wiped out the corridors, a barrier will drop, opening up the Decaying Vestibule. This is where you will meet the Tomb Lord, the dungeon’s boss. He is a big, slow skeleton, but do not let that fool you – his Bone Wall ability can trap you in tight spots. Break those walls as soon as they pop up, because he tends to follow them with heavy hits or area attacks that are hard to dodge if you are boxed in. He also calls in waves of skeletons for backup. Keep moving, stay on top of the adds, and chip away at his health while dealing with the walls. The fight is more about control than raw damage, so pace yourself.

Once the Tomb Lord goes down, you will unlock the Codex of Power entry for the Aspect of Biting Cold. This Sorcerer-only offensive aspect is a big deal for frost builds. Every time you freeze an enemy, there is a chance your Cold Snap will make them Vulnerable for a few seconds. Vulnerable is one of the strongest damage boosts in the game, so being able to trigger it often can make your build hit way harder, especially against elites and bosses. For anyone serious about a frost-focused setup, this is a must-have – and if you want to pair it with the right gear, you might want to browse Diablo 4 item options to round out your build.