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One Weapon Deletes the Last 35% of a Boss's HP | How Does El'druin Sword of Justice Work in Diablo 4 Season 15?

Aug 20, 2026 Author: D4gold

If I told you there was a weapon that allowed you to instantly kill a boss when it had only 33% health left, skipping the most insane mechanics of Mephisto's second phase and skipping Lair boss's shield phase - would you think it was some kind of bug?

However, that's not the case. This is the actual effect of El'druin, Sword of Justice in 3.2.0 PTR, but this change wasn't even listed in the official PTR notes. This article will provide a comprehensive analysis of this weapon's mechanics, application scenarios, and discuss its potential impact on Season 15.

El'druin, Sword of Justice Mechanics Analysis

One Weapon Deletes the Last 35% of a Boss's HP | How Does El'druin Sword of Justice Work in Diablo 4 Season 15?

Diablo 4 Season 15 PTR reworked El'druin, Sword of Justice, giving it a brand new effect - 35% execute chance. This means that when an enemy's health drops below 35%, an attack equipped with El'druin, Sword of Justice will instantly execute them.

This effect is incredibly powerful in practice. You can use other weapons to reduce an enemy's health to 35% or below, then switch to El'druin, Sword of Justice, and instantly kill any enemy - no matter how much health they have at 35%.

Application Scenarios Analysis

Boss Fight Phase Skipping

Mephisto Fight

Mephisto is a core boss in Diablo 4, known for its multi-phase, high-damage, and chaotic combat mechanics. Especially in the second phase, players need to deal with numerous ground AoE attacks, projectiles, and complex mechanics.

With El'druin, Sword of Justice, you only need to reduce the boss's health to 35% to instantly kill it, completely skipping the most chaotic part of the second phase.

Lair Boss

Diablo 4 Lair Boss

Lair boss has a mechanism called infernal protection, which generates a shield that lasts for 5 seconds when the boss's health reaches 66% and 33%, respectively. The shield's strength is 1/3 and 2/3 of the boss's health. This means that in actual combat, players need to deal damage equivalent to twice the boss's health to kill it.

The good news is that the reworked El'druin, Sword of Justice, completely ignores the second shield - the boss is killed at 35% health before the shield is triggered at 33%, significantly reducing the difficulty of defeating the Lair boss.

Team Play

El'druin, Sword of Justice is far more valuable in a team environment than solo, due to the scaling mechanism of the monster's health.

In a full four-player party, all monsters have quadruple health. At this point, if only one player in the party is equipped with El'druin, Sword of Justice, and executes the boss when its health drops to 35%, even if that player doesn't deal damage or provide any support, simply standing there triggering the execute is already a positive benefit.

Strength Assessment

Comparison with Aspect Powers

Assuming your damage output is even, a 35% execute is equivalent to skipping all remaining damage in the last 35% of the fight. This translates to an effective damage bonus of approximately 56%.

Currently, the baseline for any offensive gear slot in Diablo 4 is approximately 60% Aspect Power. Therefore, if you only choose to consistently use El'druin, Sword of Justice, its execute effect is not numerically superior to traditional Powers.

Superior Value in Specific Scenarios

However, in certain specific scenarios, the value of El'druin, Sword of Justice far exceeds its 56% effective damage bonus:

Skipping Boss Shield Phase: As mentioned earlier, Lair boss generates a shield equivalent to 2/3 of its own health at 33%. The actual benefit of executing at this point is equivalent to skipping a full 2/3 of its health in extra damage output, resulting in an effective damage bonus close to 100% Aspect.

Breaking Class Restrictions

Some classes cannot use certain powerful execute options. For example, Barbarians cannot use Daggers, and therefore cannot equip certain Dagger-specific execute gear. El'druin, Sword of Justice, as a one-handed sword, has broader applicability.

Potential Impact on Season 15

Changes in Tower Pushing Teams

The most likely impact of El'druin, Sword of Justice is on team composition strategies for high-level Tower runs. A four-person team only needs one player to carry the weapon and execute at the appropriate time. Even if this player sacrifices some damage output, the team's benefit is still considerable. Therefore, several configurations may emerge in the future:

  • Dual Support + El'druin, Sword of Justice wearer + DPS: The support provides survivability and damage amplification, while El'druin wearer handles the execute.
  • Three DPS + El'druin, Sword of Justice wearer: One DPS sacrifices some output for a 35% execute bonus.
  • Four DPS wearers, one wielding El'druin, Sword of Justice: Maximizing overall output while gaining execute benefits.

For players planning to try this build in Season 15, simply owning one El'druin, Sword of Justice is insufficient; you'll need other suitable Diablo 4 items to complete the build and fully realize its potential.

Potential Balance Issues

If all players switch to El'druin, Sword of Justice after the boss reaches 35% health, it may cease to be a selectively chosen item and become essential for all boss fights.

Therefore, the key to ultimate balance may not just be how powerful the 35% execute chance itself is, but whether the developers will allow players to freely switch and utilize this effect during Season 15 combat.

Overall, the truly interesting aspect of El'druin, Sword of Justice, isn't just the 35% execute chance value, but its potential to change how players deal with bosses and push higher difficulty levels in groups.

Of course, all of this ultimately depends on whether the developers retain the in-combat weapon-switching mechanic when Diablo 4 Season 15 officially launches. If this interaction is restricted, it might just be a utility weapon for specific bosses; but if the gameplay of 3.2.0 PTR is retained, it could very well become one of the most noteworthy pieces of equipment in Season 15.

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