Druid

Overabundance (Magic): Excess Spirit increases damage (10-20% per 50 Spirit).
Purge the Infected (Rare): Core Skills apply Poison. Crit guaranteed on Diablo 4 Items Poisoned targets.
Wild Transformations (Legendary): Shapeshifting triggers free buffs (Crit, DR, Attack Speed).
Savagery (Unique): Companions count as Core Skills, scaling size, and +30-60% summon damage.

Focus: Poison Druids, Spirit overload burst phases, or full Companion builds.

Necromancer

Grim Reapers (Magic): Skeleton Warriors also cast Reap.
Decimating Desecration (Rare): DoTs can Crit for +50-100% damage.
Defile the Dead (Legendary): Each Corpse consumed twice; spawns a Chaotic Burst.
Alter the Balance (Unique): Core Skills become Ultimates; Ultimates become Core Skills.

Focus: DoT crit builds, corpse nukes, and radical core-ultimate swaps.

Rogue

Unpredictable Alchemy (Magic): Basic Skills gain random Imbuements (+20-40% damage).
Enervated Strikes (Rare): Lose passive Energy regen. Core attacks have a 50-100% chance to double-cast.
Chaotic Grenades (Legendary): Grenades cause Bursts and restore Energy.
Trickster's Edge (Unique): (PTR notes incomplete, but appears mobility-based scaling).

Focus: Grenade spam, random Imbue chaos, or ultra-fast tempo builds.

Why Chaos Perks Change the Game

The introduction of Chaos Perks in Diablo 4 Season 10 fundamentally alters the way players approach the game:

1. Build Diversity Explodes - Each class gains dozens of new synergies that wouldn't exist without perk trade-offs.
2. Real Risk vs. Reward - Locking life at 50% or burning health for resources forces smarter play.
3. Endgame Depth - Chaos Perks offer scaling systems rivaling Paragon Boards or buy duriel mats gear affixes.
4. Player Expression - Builds feel more personal, since each perk amplifies a different playstyle.