Bul-Kathos's Solemn Vow

Set One-Handed Mighty Weapon

Part of the Bul-Kathos's Oath set

Item Details

On attack has chance to surround you in spinning weapons that acts as a damage aura damaging everything around you.

  • Internal Cooldown: ?
  • Internal Proc: ?
  • Benefit from +% element: Yes
  • Can crit: Yes
  • Affected by ability proc coeff: ?
  • AoE: Yes (~ 15 yards)
  • Dual wielding:
    • Activates from either weapon.
    • Scales with activating weapon damage.
  • Item quirks/potential bugs:
    • The item effect can activate upon any action, e.g. opening stash or talking to vendors, not just on attack.

Damage Formula

Whirlwind damage (every 0.5 s for 6) = proc mod * average weapon damage * primary mod * crit mod * total weapon aps

proc mod: proc's damage coefficient, often displayed on the item.

  • value: 1.625

average weapon damage = ((minimum weapon damage + maximum weapon damage) / 2)

primary mod = 1 + (primary attribute/100)

crit mod = 1 + (crit chance/100 * crit damage/100)

total weapon aps = (base weapon aps * weapon IAS) * (1 + sum of attack speed increase / 100)

A whirlwind of weapons engulfs you for 6 seconds.

Set Information

Bul-Kathos's Oath

(2) Set:

  • Increases Fury generation per second by 10
  • +10 Maximum Fury (Barbarian Only)
  • During Whirlwind gain 30% increased Attack Speed and Movement Speed

Guaranteed Stats

The minimum level this item can drop at is 60. Below you will find the range of stats found on the level 60 version, however the item can drop at any level above 60. The legendary effect does not change with level.


  • 277.6 Base DPS
  • 150–277 Damage
  • 1.30 Attacks per Second

Primary Stat

  • +330–524 Strength

+3 Random Magic Properties

Empty Socket


  • 1862.9–2209.4 Base DPS
  • (1230–1448)–(1636–1951) Damage
  • 1.30 Attacks per Second

Primary Stat

  • +626-750 Strength

+3 Random Magic Properties

Empty Socket

As of Patch 2.1.0 (August 26, 2014) the following changes were made to this item:

  • No longer rolls with guaranteed Attack Speed and Life per Hit. Replaced with an extra random property and guaranteed socket.

Flavour Text

Bul-Kathos strode as a giant among the ancients, and was the forefather to the barbarian tribes. This sword represents the sacred vow he made to protect Mount Arreat and the Worldstone.

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