Diablo IV Expansion Day One Impressions: The Hardest Boss Was the Servers

The launch of the new expansion for Diablo IV brought exactly what many longtime Blizzard fans expected: excitement, chaos, and server problems. Somehow, the most difficult enemy during the first few hours wasn’t a demon, a boss fight, or an elite monster. It was the infamous “Disconnected From Server” screen.

After managing to squeeze in about an hour of gameplay before repeated disconnects took over, the journey reached level 12, included several boss encounters, and offered a first look at the new region, systems, and the brand-new Warlock class. Even with the technical issues, the expansion already shows flashes of potential.

Going Into the Expansion Completely Blind

One of the most exciting parts of starting a new expansion is discovering everything naturally, without guides, tier lists, spoilers, or optimized builds. That was the approach here: no trailers, no strategy videos, and no deep dives beforehand.

The goal was simple — experience the expansion organically from level one all the way to endgame.

That said, even players who skip dialogue and cutscenes should still expect spoilers while exploring the campaign. The expansion wastes very little time before throwing players directly into its darker new storyline.

Character Creation Feels More Expressive

The journey begins with character creation, and surprisingly, some of the smaller customization additions stand out immediately.

The new hair color combinations — especially mixes of black with red or green highlights — add a lot more personality to characters. Whether these options are entirely new or simply easy to miss in previous updates, they help characters feel less generic and more distinctive.

Tattoos and cosmetic tweaks also contribute to making the new heroes feel more personal.

And of course, there was really only one logical class choice for day one: the Warlock.

First Impressions of the Warlock Class

Since the Warlock is the headline class of the expansion, it naturally became the focus of the first playthrough.

Early abilities leaned heavily into classic dark magic fantasy:

• Summoning demonic allies
• Shadow-infused attacks
• Dark spellcasting themes

At level 12, the build was still far from complete, but the class already felt thematic and visually satisfying. There wasn’t enough time yet to fully experiment with synergies or talent paths before the server issues interrupted progress, but the foundation looks promising.

A New System: Charms

One of the first major gameplay additions encountered was a new system called Charms.

At first glance, Charms appear to function as an additional layer of passive customization. Instead of relying entirely on gear and talents, players can equip bonuses that further shape their builds.

Early impressions suggest the system may:

• Add more build flexibility
• Encourage experimentation
• Create another progression layer outside of equipment

Because the servers became unstable so quickly, there wasn’t enough time to fully explore the system yet. Still, it immediately felt like a meaningful addition rather than a gimmick.

The Journey to the New Region

The expansion begins by sending players toward the new island region located southwest of the main map.

Naturally, the trip does not go smoothly.

The introductory sequence aboard a ship quickly turns into chaos as monsters swarm the deck, forcing players into combat almost immediately. The sequence actually captures some nostalgic energy reminiscent of older entries in the series, especially moments from Diablo II where travel itself felt dangerous.

The First Boss: Hateform Abomination

The first major encounter arrives aboard the ship in the form of the Hateform Abomination.

The fight itself is relatively straightforward:

• Waves of smaller enemies
• Area-of-effect attacks covering sections of the arena
• Fast-paced chaos

What really stands out is the boss design. After years of seeing reused enemy archetypes across ARPGs, the creature actually feels fresh enough to be memorable. It immediately establishes the darker tone of the expansion and serves as a solid introduction to the combat ahead.

Exploring the New Region

Eventually, players arrive in the new island region, which immediately feels different from previous areas in Diablo IV.

While still dark and oppressive, the environment feels slightly more alive and structured rather than completely destroyed. NPC conversations, guided story sequences, and tightly controlled pathways make the opening hours feel more cinematic than some previous campaign sections.

Of course, being an RPG, the story eventually sends players exactly where every RPG loves to send them:
the sewers.

Sewers, Rat Kings, and the First Death

Inside the sewers, players track one of Mephisto’s disciples while dealing with swarms of rat-like enemies.

This is where the first death of the expansion occurred.

The culprit was an enemy called the Rat Caller, a creature that may or may not be entirely new, but certainly felt unfamiliar enough to stand out. Combined with the overwhelming number of enemies filling the narrow sewer spaces, it created a surprisingly dangerous encounter early in the campaign.

It was the kind of sudden death that reminds players they are still underleveled and learning the systems.

The Vermin Monarch Boss Fight

After recovering from the sewer ambush, the next major boss appears: the Vermin Monarch.

The fight resembles a classic Rat King-style encounter:

• A massive rat creature
• Swarms of smaller rats
• Repeated area attacks
• High enemy density

Mechanically, it serves as a fairly straightforward introductory boss, but it fits the sewer atmosphere perfectly and maintains the grim tone of the campaign.

The Galvanized Mauler

Following the sewer section comes another boss encounter deeper within a cave system: the Galvanized Mauler.

Unlike the previous fights, this boss focuses more on brute force:

• Heavy melee attacks
• Large AoE swings
• Ogre-like enemy design

Ironically, despite appearing more intimidating, the fight actually felt easier than some earlier encounters once its attack patterns became clear.

Diablo Meets Game of Thrones

One of the more memorable story moments occurs after returning to the city, when the player character is publicly humiliated and cast out.

The sequence strongly resembles a “walk of shame” moment straight out of Game of Thrones. It is dark, uncomfortable, and perfectly in line with Diablo’s oppressive atmosphere.

Moments like this help the campaign feel more narrative-driven and cinematic compared to earlier sections of the game.

Yes, There’s Fishing Now

In one of the expansion’s stranger surprises, fishing has officially arrived.

At the moment, it appears fairly basic, functioning more as a small side activity than a fully developed system. Still, its existence is amusing in a Diablo game, and it would not be surprising to see Blizzard expand it later with rare or legendary fish rewards.

The True Final Boss: Blizzard Servers

Unfortunately, the biggest challenge of launch day had nothing to do with gameplay.

Repeated server disconnects eventually brought progress to a halt, with multiple disconnects occurring back-to-back over a short period of time. For longtime Blizzard fans, this was frustratingly familiar.

After more than two decades of launches plagued by instability, launch-day server problems almost feel like part of the tradition at this point.

Still, despite the technical issues, the first impressions of the expansion remain mostly positive.

Final Thoughts After Day One

Even with limited playtime, the expansion managed to deliver:

• A strong atmosphere
• Several memorable boss encounters
• A promising new class
• Interesting new systems
• A visually distinct region

The servers may have won round one, but the foundation here feels solid.

Once stability improves, the real experimentation can begin:

• Developing a full Warlock build
• Exploring Charms in depth
• Pushing deeper into the new campaign
• Discovering what the expansion truly offers at endgame

For now, though, the undefeated world boss of launch day remains Blizzard’s servers.