Diablo 4 Secrets Guide: All Hidden Quests, Easter Eggs, Cow Level & Secret Rewards

Summary

Diablo 4 is filled with hidden secrets spanning from the base game through both expansions—Vessel of Hatred and Vessel of Lords. This guide covers the most rewarding discoveries, from simple hidden titles to complex multi-step puzzles. Whether you're hunting for rare cosmetics or powerful rings, knowing what to keep and what to trade is key—if you end up with valuable loot that doesn't fit your build, consider listing your Diablo 4 Items for sale to fund your next treasure-hunting expedition.

Part 1: Lighthearted Secrets

The Tomato Face Title (Vessel of Lords)

Early in the Vessel of Lords campaign, Lorath is banished from Themys as the crowd throws tomatoes at him. You can intercept these tomatoes! Position yourself between the crowd and Lorath and get hit by 10 tomatoes to earn:

A hidden achievement

The "Tomato Face" secret title

Visiting the Graves of Neyrelle and Lorath

Neyrelle's Grave: Located northwest of Yelesna on the Fractured Peaks, near the Koradrim Vault entrance, beside her mother Benard's grave.

Lorath's Grave: After the Vessel of Lords ending, complete Tyrael's side quest to recover Lorath's remains. His grave sits on the Beautiful Coastal Cliffs northeast of Philos on Scosglen.

Part 2: Hidden Cosmetics, Mounts, and Pets

"Mouth Howling at Madness" Portal

Obtained through the Echoing Hatred uber endgame content:

Enter Echoing Hatred and activate specific shrines at certain thresholds:

Waves 1-9: Shrine of Protection

Waves 10-14: Shrine of Bombardment

Waves 15-19: Shrine of Lethality

Waves 20-24: Shrine of Focus

Defeat the Transparent Goblin after activation

Earn the portal and a related achievement

Hidden Pets

"Dog with a Knife" Pet: Reach Wave 60 in Echoing Hatred

Murloc Pet: Obtained through fishing with extremely low drop rates

Exclusive Mounts

Part 3: The Legendary Cow Level

The Cow Level remains a Diablo franchise staple. Diablo 4's version continues to evolve.

Entering the Cow Level

You can enter the Cow Level every Tuesday

Characters who defeat the Cow King once can generate the portal freely

Portals can be shared with other players

The Cow God: Moo-phisto

At Season 15 PTR, dataminers discovered Moo-phisto—a Cow God beyond the Cow King, along with a potential drop: Moo-phisto's Cowbell.

The clues: The Cow King's helmet description parodies "Three will come" and explicitly mentions Moo-phisto. The "Premium Ribs" dropped by the Cow King read "an offering to the gods"—likely required to summon the Cow God.

While the quest stalled through Season 14, Season 15's PTR suggests the Cow God encounter will be added soon.

Bonus Fishing Locations

During the Cow Level quest chain on Saila Island:

Fishing in Rainbow Unicorn Bone Puddles yields Mythic Fish

Fishing into open ocean may pull up cows

Part 4: The Fortune Coin Quest

This multi-season, multi-class relay quest spans from base game through Vessel of Lords.

The Boon's Ring (Base Game)

Finding Fortune Coins:

Play on Torment 1+

Find a Shrine of Greed and activate it

Find an NPC execution event and interact with corpses while the shrine is active

Random chance to obtain a Fortune Coin

Recommended farming: East of Cerrigar (Duriel's Lair fields and Blood Pool Hill fields)

Wishing Well:

Take coins to the well east of Cerrigar

One coin with one character gives a follower called "Supporter"

For The Boon's Ring, create one character of each class and offer one coin per class

Wait for the well's bubbles to disappear between character swaps

Current requirement: 8 coins (8 classes with Vessel of Lords)

Party strategy: Six players of different classes can each offer one coin in the same instance—when the final coin is offered, all party members receive the ring.

The Curse Ring (Vessel of Hatred)

Explore Traveler's Mountain Path (southwest of Krust)

Find a destructible object called "Courage"

Activate a Shrine of Explosion and destroy Courage

A small invulnerable mouse appears and runs for 429 seconds

Follow the mouse until it explodes, dropping a Greater Fortune Coin

Take it to the grave southwest of Samuk Village

Interact to receive the Curse Ring

The Unfinished Third Fortune Coin (Vessel of Lords)

Datamining has revealed a "Largest Fortune Coin" and a reward item called "Necklace of Dark Omen"—but no one has discovered how to obtain them yet. The pattern suggests a specific shrine effect plus interaction (likely with fishing) in Scosglen. This remains an unsolved mystery.

Part 5: The Krakken Secret Quest

This hidden quest doesn't appear on the world map:

Enter the Themys Tavern—listen to NPCs talking about a Krakken corpse

Travel east of Philos Island to find the massive Krakken corpse

Fish in the blood-red water—a monster appears

Defeat it and collect the Lost Arm

Return to the tavern NPCs—they'll tell you about the Red Eel, Scosglen's rarest fish

Enter the Krakken corpse's interior and fish for a Krakken Parasite

Travel to Skartara Island and fish with the parasite as bait

Encounter the massive Red Eel and complete the quest

Part 6: The Chronicles of Creation

Scosglen features 30 hidden pedestal sets called Chronicles of Creation—similar to Lilith Altars but purely for achievements.

Mechanics:

Each set has 3 pedestals: Primordial (main), Inarius, and Lilith

Interact with the Father and Mother pedestals to change their direction

When both face the Child pedestal correctly, beams of light connect all three

Activating all 3 completes one set

Rewards: Completing all 30 sets reveals family backstory, unlocks a hidden side quest, and features the first mention of "Nephalem" in the Diablo 4 trilogy.

Part 7: The Council of Koron (Pit Secrets)

Koron was Zoltun Kulle's Horadrim colleague, used as a test subject during the Pit's development.

Finding Koron's Lore:

Look for 20 tablets across Pit levels 1-96

Tablets appear every 5 levels (1, 6, 11, 16, etc.)

Always in a corner on level 1 of each floor

Koron Boss Encounter:

After finding all tablets, the Pit boss has a random chance to be replaced by Koron

Defeat him to free him from torment

Earn the achievement: "The Culmination"

Final Tips for Treasure Hunters

Farming Fortune Coins:

Stack Lucky Hit Chance as high as possible

Use a high-mobility Sorcerer with the mythic item Avalon

Farm Duriel's Lair fields or Blood Pool Hill fields

Dismount before shrine effects activate—mounting removes buffs

Reset instances if all monsters and corpses are cleared

Fishing is key to many hidden quests—keep casting!

Several secrets remain unsolved—including the mysterious third Fortune Coin quest and the true method for summoning Moo-phisto. If you discover something, share it with the community! And if you need a power boost to tackle these tougher challenges, you can always buy Diablo 4 Items to gear up quickly. For reliable and fast transactions, MMOEXP is a solid option to consider.