We have the pre-launch patch notes, and there have been some big changes to the boss powers in the seasonal mechanic since we saw them on the PTR. Most powers have received massive buffs to damage and effectiveness, and all but 6 have been changed in some way.
You can check out all 24 powers and their full descriptions in our Boss Powers guide.
Boss Powers
Andariel’s Flaming Skull
- Primary Power
- Damage decreased from 1800% to 450%.
- Modifier
- Damage over time bonus decreased from 21%-40% to 10.5-20%.
- Damage over time no longer requires enemies to be burning.
- Removed additional burn damage when triggering Primary Power.
Allek’s Talons
- Primary Power
- Channeled Basic abilities can now proc this ability while channeling.
Avarice
- Modifier
- Damage bonus per resource point decreased from 1.5%-3.4% to 0.01%-0.20%.
Belial’s Eye Beams
- Primary Power
- Damage decreased from 1750% to 438%.
- Damage Reduction decreased from 75% to 50%.
- Reduced amount of eye beams from 6 to 5.
- Slightly sped up the eye’s orbiting rotation.
- Eye’s durations reduced from 3.5 to 2 seconds, damage over time duration is unaffected.
Beastmaster’s Training
- Primary Power
- Summons now stuns for 2-4 seconds instead of taunts.
Blackmailer’s Sabotage
- Modifier
- Barrier amount reduced from 20%-58% to 11%-30%.
Duriel’s Burrow
- Primary Power
- Damage decreased from 200% to 100%.
- Modifier
- Increased Dodge duration from 2 to 5 seconds.

Flesh Reaper’s Disruption
- Modifier
- Increased Vulnerable Damage from Crowd Control bonus from 0.25%[x] to 0.5%[x].
Grigoire’s Lightning Square
- Primary Power
- Damage Decreased from 300% to 250%.
Harbinger of Hatred’s Volley
- Primary Power
- Damage decreased from 400% to 250%.
- Modifier
- Fixed Vulnerable bonus to be multiplicative.
- Added a 1 second cooldown to activating this modifier.
Hatred’s Embrace’s Hate
- Modifier
- Maximum Critical Chance bonus decreased from 22.5%-70% to 12%-50%.
Lord Zir’s Blood Pool
- Modifier
- Increased Heal amount from 5.5%-15% to 17%-36%.
Lilith
- Primary Power
- Damage increased from 250% to 400%.
- Modifier
- Only 1 Blisters can exist per Elite, and 2 per Boss.
- Blisters can no longer become executed from abilities that cannot execute bosses.
- Blister Elite damage reduced from 5.25%-10% to 2.1%-4%.

Sinerat
- Primary Power
- Damage decreased from 200% to 50%.
Skerg’s Toxins
- Primary Power
- Changed to whenever you take direct damage.
- Damage decreased from 1000% to 600%.
Urivar
- Primary Power
- Damage decreased from 800% to 400%.
- Added a 1 second cooldown to this ability.
- Removed 5 second ultimate cooldown reduction.
- Gain 15% Cooldown Reduction.
Varshan’s Life Steal
- Primary Power
- Leeching beam now always works on a surrounding enemy.
- Damage is over 1 second instead of 3.
- Increased damage to 700%.
Wandering Death’s Chest Beam
- Primary Power
- Adjusted the beam to start closer to your character.
- Modifier
- Execute threshold 15%-34% to 15.5%-25%.