If you're stocking up for Diablo 4's nastier endgame checks, it helps to have a reliable place to grab gear and currency on u4gm D4 items before you start chasing the stuff the game barely explains. This hidden boss path isn't like spamming one dungeon until you go numb. It's a full-map scavenger run with real consequences if your build's flimsy. You'll be bouncing between regions, events, and instanced fights, and the whole thing starts with the Purified Essence system.

Finding the Four Purified Essences

You can't shortcut this part. You need all four Purified Essences, and each one is tied to a specific encounter. 1. Purified Tongue of Azmodan comes from killing Azmodan during a world boss event in Hawezar. It's loud, messy, and random players can make it chaotic, so bring something that can survive while you're rezzing. 2. Purified Claw drops after you beat Andariel in the Under City. It's tight quarters, and if you're sloppy with positioning you'll get pinned and punished fast. 3. Purified Eye of Belial is from Belial inside the Pit, and it feels like a stamina test more than a burst race. 4. Purified Horn is the weird one, because you'll be watching for the Hell Flood event where Duriel shows up instead of the usual Blood Maiden encounter.

Activating the Ancient Altars

Getting the set doesn't pop the portal by itself. You've gotta physically take each essence to an altar and offer it up. The altars are spread across Hawezar, Nahantu, Fractured Peaks, and Kehjistan. The order doesn't matter, and you can do them in separate sessions if you want. But nothing progresses until all four are activated, so don't expect some halfway credit. Once the last altar lights up, that's when the portal to the hidden arena finally opens.

What the Secret Fight Actually Demands

Go in thinking you'll just melt it, and you're probably going to eat dirt. This boss is an endgame durability check, plain and simple. If your armor and resistances aren't handled, you'll feel it immediately. If you don't have real defensive layers, you'll run out of potions and room to breathe. Mechanics matter here, and the fight punishes "glass cannon and vibes" gameplay hard. If you want the run to feel consistent, build for survival first, then add damage.

Why It's Worth Doing Anyway

The payoff isn't just bragging rights, even if that's half the fun. The chest can drop valuable crafting materials like Majestic Spark for Mythic crafting, plus Tributes for the Under City, Legendary Uniques, and sometimes cosmetics. It's the kind of reward pile that makes the whole map-wide chore feel justified. If you're trying to smooth out the prep so you can focus on the hunt, you can also browse D4 items for sale and then jump back into tracking events and altars with less downtime.