If you're looking for a Warlock build that's usable after Diablo 4 Season 15 launches and can easily level up from the early game to T12 difficulty, then Fiend of Abaddon build is definitely worth considering.
The main advantage of this build is that once you acquire the core Diablo 4 items, the gameplay becomes incredibly simple, requiring minimal skill switching.
However, this also means that the build's full potential isn't realized at level 1, so resource allocation and manual skill activation are necessary during the early stages of the new season.

Warlock in Season 15
Warlock will undoubtedly be one of the strongest early-game builds for Diablo 4 Season 15, as Patch 3.2.0 PTR announcement indicates that Warlock will significantly benefit from the new season's Hellfire mechanics and Demonic Gems. Fiend of Abaddon build leverages these mechanics.
Its main advantage lies in its efficient leveling experience. Players can start with a more aggressive upgrade setup and gradually transition to an Abaddon-riding playstyle without replacing all parts of the build.
Mechanics
Fiend of Abaddon is the primary damage source for this build. After summoning Abaddon, Warlock can ride the demon across the battlefield, while other teammates assist with damage output and maintaining skill duration.
Once the gear and Paragon levels reach the endgame requirements, your battlefield flow is essentially: Summon Abaddon → Mount → Move through enemies.
However, this doesn't mean all combat is hands-free. Players still need to react based on elite affixes, hazard mechanics, skill cooldowns, and positioning.
Hellhound's Sabatons
Hellhound's Sabatons are the most important gear objective for this build early in the game.
On the current Diablo 4 Season 15 PTR, these boots interact with the gear's Fire Skills, helping to automate parts of the character's rotation. This significantly reduces the number of skills the player needs to manually cast, making the gameplay more stable.
It's important to note that players need to be prepared for more frequent skill rotations before acquiring Hellhound's Sabatons.
This is because Abaddon's sustained damage output may require additional support from the skill tree or Paragon Board. After equipping Hellhound's Sabatons, these points can be redistributed based on the final gear stats and balance values, focusing on damage, defense, or resource management.
Leveling With Fiend of Abaddon
During the character leveling phase, the focus should be on reliable resource acquisition and sustained damage output, rather than simply maximizing maximum DPS.
Command Fallen can serve as a basic resource acquisition tool in the early stages of Diablo 4 Season 15. Combining it with Bombardment, Blazing Scream, Dark Prison, and Fiend of Abaddon will meet the damage, support, and resource needs for early map clearing, accumulating Diablo 4 gold and items needed for later upgrades.
Specific skill configurations may be adjusted upon the official launch of the new season, but the overall priority should follow this principle:
- Use Command Fallen to support resource generation;
- Cast Bombardment to gain additional damage and soul generation;
- Use Blazing Scream as the core damage skill for Infernal;
- Add Dark Prison to provide support and supplementary damage;
- Use Fiend of Abaddon as the primary damage source;
During this period, players should avoid wasting resources without a plan. The effects of certain Demonic Gems may require a trade-off between higher damage and higher damage taken, and high-cost skills may prevent characters from maintaining their skill rotation.
Demonic Gems and Soul Mechanic
Demonic Gems are one of the core seasonal systems of Diablo 4 Season 15. Their effects significantly alter a build's damage output, survivability, and resource management.
For Fiend of Abaddon, soul-related effects are particularly important. Killing enemies allows this build to accumulate souls, which increases damage but also introduces defensive risks. The more aggressively this build stacks this bonus, the more crucial it is to maintain sufficient life, resistances, and damage reduction.
Warlock is well-suited for this mechanic, as the class can frequently kill enemies through direct attacks and summoning demons. Bombardment and Blazing Scream are particularly useful during leveling, as they help clear mobs and maintain the seasonal effect.

Recommended Gear
This build doesn't overly rely on Mythic Uniques; its strength and performance depend primarily on core Diablo 4 unique items, suitable affixes, and the seasonal mechanics.
Leoric's Crown
Leoric's Crown provides effective defensive and offensive stats for this build. Critical strike chance becomes especially important if other gear is heavily focused on critical strike damage.
Stone of Jordan
Stone of Jordan is a powerful late-game choice, as it increases damage while also helping the character meet important resistance requirements. Especially in the higher Torment difficulty of Diablo 4 Season 15, elemental resistances and overall survivability become crucial, making its defensive value particularly significant. In-Geom
In-Geom reduces skill cooldowns after kills and helps this build maintain its combat rhythm during periods of high monster kills. Its effect is most significant when the player can consistently secure kills.
Moloch's Bleeding Flames
Moloch's Bleeding Flames provide additional attack bonuses, aligning with the build's damage composition. Its ultimate value will depend on the item's adjustments in Diablo 4 Season 15 and bonuses to other character attributes.
Horizon's Chains
Horizon's Chains support an Abaddon-centric playstyle and contribute to the build's intended combat cycle.
Recommended Attributes
Optimal attribute priorities will depend on the final items and balance adjustments, but this build generally benefits from a balanced combination of damage, health, and resistances.
Potential offensive attribute priorities include:
- Critical Strike Chance
- Critical Strike Damage
- Vulnerability
- Fire Damage
- Primary Attribute
Defensive attribute priorities include:
- Maximum Life
- Armor
- Elemental Resistances
- Damage Reduction
And, importantly, cooldown reduction shouldn't be overlooked.
Furthermore, simply equipping this build doesn't guarantee reaching Torment 12. Even at Season 15, you'll still need to increase item power, enhance resistances, upgrade Glyphs, and adjust your build based on the activities you're undertaking.
However, compared to other classes and builds, Fiend of Abaddon Warlock has a clear upgrade path, strong synergy with the season's Demonic Gems, and, with the right gear, a smoother late-game damage rotation.
For Warlock newbies who want an efficient way to level up, acquire core gear, and potentially enter Torment 12 without immediately rebuilding their character, this build is definitely a powerful option to consider when Diablo 4 Season 15 is released.














