Diablo 4 Season 15's secret hunt keeps growing, and here is everything found so far

From the Secret Cow Level to Whimsyshire and a fish boss, there is a lot to uncover.

Jaymo

Editor

Published Oct 19, 20265 min read

Some took weeks to solve, others a single evening, and one even required 2 expansions, but in any case, the community found a way to solve them.

Season 15 probably had more secrets than the game had since launch, and it might be hard to figure out what can already be completed and what remains unsolved. So we gather together all the current secrets that you can complete right now.

All Diablo 4 Season 15 Secrets Discovered So Far

Echo of Tristram and the Hellfire Torch

This is probably one of the most important secrets, and you should definitely complete it. It involves Deckard Cain, ten journals, and a trip back to Old Tristram where you can complete side quests, get a free Harlequin Crest, some Prime Rib, two achievements, and take part in a Pinnacle fight against all 3 Prime Evils at the same time.

Beating the Prime Evil rewards you with the most powerful Charm in the game, Hellfire Torch.

The 19 Returning Diablo 2 Runewords

These were found at the beginning of the Season. Blizzard added multiple Runewords from Diablo 2, and they can be simply crafted through the Horadric Cube. Each Runeword requires specific Runes and a White Item.

The best one being Enigma.

Enigma

Ancestral Unique Chest Armor

850 Item Power

---

+2 to All Skills

+45% Movement Speed

12.0% Damage Reduction

40.0% Maximum Life

+[780 - 980] Armor

Your Evade is now Sorcerer's Teleport and costs 33 Primary Resource.

JahIthBer

The Secret Cow Level

Probably the biggest and the longest quest to complete in the game.

Not only do you have to farm 666 Cows three times, but you also have to kill zombies, corrupt some items, participate in other strange rituals, and a ton of other things that span across the base game and both expansions, until they finally lead you to the famous Secret Cow Level.

In there, you can farm the Cow King for Prime Rib, and these are needed for another secret.

Moophisto

Yes, Mephisto can turn into a huge cow. You need the Prime Rib from the Secret Cow Level to access the Bovine Sanctum, in which Moophisto is hiding.

Defeating him rewards you with crafting materials and gear, and you have a low chance of getting cosmetics such as the Marquis Milky pet.

Mefishto

No, you are not dreaming. After Mephisto the cow, we also get to fight Mefishto the fish...

This involves a LOT of fishing.

Whimsyshire and the Cuddly Conduit Portal

This is probably our personal favorite. If you completed Rank 5 of your Season Journey, you should have one Liquid Rainbow. Use it, and you get a trip to unicorn-land. But be careful, because they are not that friendly.

Defeating Neygh'relle has a chance to reward you with a cupcake, and eating that one gives you a really cool Town Portal Cosmetic.

The Bovine Cosmetic Set

Season 15 also revealed a new cow cosmetic set with multiple pieces that you can obtain from various content, including fishing, the Secret Cow Level, Moophisto, and even Tristram.

The Lucky Coin Mystery

This is another mystery that has been running since the release of the game. It involves three coins:

• Lucky Coin

• Luckier Coin

• Luckiest Coin

Make sure you differentiate these coins from Wirt's Lucky Coins which is used for Old Tristram and the Prime Evil fight.

The three coins are gathered through a very long questline and unlock a secret fight against the Unlucky Council, where you have to fight Echoes of Neyrelle, Lorath, and Donan. You get another coin from this, the Horadric Coin.

This last coin is still hiding a mystery that no one has figured out just yet!

Uber Diablo and Annihilus

If you are fighting World Bosses, you might have seen him already. No one really knows what triggers him to appear, but there is a very low chance for Uber Diablo to pop up after a World Boss fight. Defeating him rewards with Annihilus, a powerful Unique Seal.

Squirt the Peddler

This is a "secret" vendor you can find hiding in Temis, and if you unlocked the Secret Cow Level once, he will sell the Outcast's Travel Pouch that contains the items needed to access the level faster next season.

The Temple of Baaaaaaal

After Moophisto and Mefishto, it's Baal's turn, but this time, it is about Sheep.

Once you have access to Forlorn Hovel through the Cow Level questline, you can find a portal to a dungeon filled with sheep. Inspect a dead body to get the mysterious Map of the Stars.

It is still unknown what this Map is used for, so keep it in your stash for now.

Are There Any Season 15 Secrets Left to Find?

We know a few things that remain unsolved, such as the use of the Horadric Coin and the Map of the Stars, but outside of that, it is hard to know if there is anything left or not.

Blizzard seems to add little things here and there with each patch. The Whimsyshire portal cosmetic was only discovered a few days ago after the latest update, so it is not impossible that secret cosmetics or locations still get added until Season 15 ends.

And, of course, future Seasons might also hide many new mysteries.