If you’re deep into Diablo 4 Season 11, you’ve probably noticed Purified Essences stacking up and thought, “Is this just more seasonal junk.” It isn’t. Hang on to them, even if your stash is already a mess. These drops are basically tickets to a hidden endgame challenge, and the game doesn’t exactly spell that out. I’ve seen people vendor them, then realise later what they’ve done and spiral. If you’re the kind of player who likes chasing the weird stuff, it’s worth keeping an eye on guides and trading chatter over at U4GM while you farm.

What the essences are really for

The idea is simple: you collect four specific Purified Essences, then use them at four separate altars to open a mystery portal. In practice, it’s a season-long routine of getting slapped around by bosses until you’re geared enough to stop getting slapped around. The important bit is that these aren’t “nice-to-have” trophies. Each one is tied to a particular encounter, and you can’t brute-force your way past the process by only running your favourite activity. The loop forces variety, which is cool, until it’s 2 a.m. and you’re still missing one drop you swore you already had.

Where each Purified Essence comes from

1) Purified Tongue of Azmodan comes from the Azmodan World Boss event in Hawezar. Show up early, because if the group’s weak the timer pressure feels brutal. 2) Purified Claw of Andariel is from an Andariel encounter in the Under City, and her poison-heavy patterns punish lazy positioning. 3) Purified Eye of Belial drops from Belial in the Pit, and if you’ve pushed high tiers you already know how fast one mistake can turn into a wipe. 4) Purified Horn of Duriel can come from Duriel appearing during a Hell Flood event where he can replace the Blood Maiden, which is the kind of surprise that makes your screen go from “routine farm” to “oh no” in one second.

The altar run and the question-mark portal

After you’ve got all four, the game makes you travel. You need to hit ancient altars in Hawezar, Nahantu, Fractured Peaks, and Kehjistan, and you can do them in any order. It’s a proper lap around the map, so plan it like a route instead of ping-ponging randomly.

When you drop the last essence, a portal shows up with a label that’s basically just question marks. That’s your cue to stop messing around with loot sorting and actually focus, because the fight on the other side isn’t tuned for half-finished builds.

Why you shouldn’t rush the fight

The payoff is real: you’re looking at a Majestic Spark for Mythic crafting, plus Under City tributes and some cosmetic flex. But the bigger issue is wasting your whole farm cycle by walking in undercapped and getting deleted. Double-check armor, resists, and whatever your build uses for damage smoothing before you click in. If you’re short on crafting components after a few attempts, topping up cheap Diablo 4 materials can help you get back to re-rolling and upgrading without turning the grind into another week-long detour.