Season 20 or the Season of the Forbidden Archives is set to go live in Diablo III next week (across PC and consoles) where in addition to a very Kulle new theme Patch 2.6.8 also sees the arrival of three new class sets - one each for the Barbarian, Witch Doctor, and Wizard.


So what's the new seasonal them all about?

For the duration of Season 20, all slots in Kanai's Cube will be able to select Legendary powers from Weapon, Armor, or Jewelry

This means you could select three Armor powers, three Weapon powers, three Jewelery powers, or any other combination thereof across all categories

Items are not self-additive or multiplicative (meaning, you cannot stack multiples of the same item's power)

This is definitely a very interesting change that should pave the way for some very powerful glass-cannon like builds - because, hey, it'll be hard to resist stacking three Weapon powers for that extra dose of demon melting power.

Once again a new Season will see the arrival of new sets, as outlined below - including updates to Legendary Items to further buff their power.

Barbarian

New Class Set: Horde of the Ninety Savages

• 2-Piece Bonus: Double the effectiveness of all Shouts. Feared, Frozen, or Stunned Enemies take double damage.
  
• 4-Piece Bonus: Each stack of Frenzy reduces damage taken by 6%. Frenzy lasts twice as long.
  
• 6-Piece Bonus: Frenzy deals 1000% increased damage per stack.

Undisputed Champion

• Frenzy gains the effect of every rune and deals 300-400% increased damage.

Bastion's Revered

• Frenzy now stacks up to 10 times and hits an additional time per stack. Each additional hit will chain to any enemies within 15 yards and the damage is split between all affected enemies.

Witch Doctor

New Class Set: Mundunugu's Regalia

• 2-Piece Bonus: Big Bad Voodoo now follows you and lasts twice as long.
  
• 4-Piece Bonus: Gain 60% damage reduction for 30 seconds when you enter the Spirit Realm.
  
• 6-Piece Bonus: Spirit Barrage deals 20000% increased damage plus an additional % equal to 5 times your Mana Regeneration/Second.

The Barber

• Instead of dealing direct damage, your Spirit Barrage now accumulates on the target. When you stop casting, it explodes dealing 400-500% of the accumulated damage to all enemies within 15 yards.
  
• Is now classified as a Ceremonial Knife, with a base 1.4 attack speed

Gazing Demise

• Spirit Barrage gains the Phantasm rune. Each active Phantasm lasts twice as long, increases the damage of Spirit Barrage by 100-150%, and also increases the attack rate from Manitou spectres.

Ring of Emptiness

• You deal 250-300% increased damage to enemies affected by both either your Haunt and or Locust Swarm.

Wizard

New Class Set: The Typhon's Veil

• 2-Piece Bonus: Double the duration of Hydras and increase the number of heads on multi-headed Hydras by two.
  
• 4-Piece Bonus: Damage taken is reduced by 8% for each Hydra head alive as long as there is one available. Each time you take damage, a Hydra heads dies. Heads cannot die more than once every 2 seconds
  
• 6-Piece Bonus: Hydras deal 1300% increased damage for each Hydra head alive.

Serpent's Sparker

• You may have one extra Hydra active at a time and they deal 250-300% increased damage.

The Magistrate

• Your Hydras now periodically cast Frost Nova and deal 250-300% increased damage.

Etched Sigil

• The bonus granted by this item now occurs 1 second after channeling has begun.

Deathwish

• The bonus granted by this item now occurs 1 second after channeling has begun.

And for those looking to get their Season plans in early the sets granted by Haedrig’s Gift in Season 20 are:

Barbarian – Immortal King’s Call
Crusader – Seeker of the Light
Demon Hunter – Natalya’s Vengeance
Monk – Uliana’s Stratagem
Necromancer – Trag’Oul’s Avatar
Witch Doctor – Spirit of Arachyr
Wizard – Vyr’s Amazing Arcana

Season 20 begins Friday, March 13 at 5:00 p.m. PDT - which is Saturday at 11am in Australia.