Purity

Purity
Reduce your skill cooldowns by 2 seconds. You are unlucky.
All skill cooldowns are reduced by 2 (+1 per stack) seconds. All random effects are rolled +1 (+1 per stack) times for an unfavorable outcome.
Rarity	Lunar
Category	Utility
Unlock	The Calm
Stats
Stat	Value	Stack	Add
Cooldown Reduction	2s	Linear	+1s
Luck	-1	Linear	-1

The Purity is a new item in Risk of Rain 2. It is the counter-item to 57 Leaf CloverLuck is on your side.
All random effects are rolled +1 (+1 per stack) times for a favorable outcome..

For convenience, a list of luck based items that can achieve 100% chance, thereby not being affected by negative luck once 100% chance is achieved: Lens-Maker's GlassesChance to 'Critically Strike', dealing double damage.
Your attacks have a 10% (+10% per stack) chance to 'Critically Strike', dealing double damage. (and other Critical Strike items), Sticky BombChance on hit to attach a bomb to enemies.
5% (+5% per stack) chance on hit to attach a bomb to an enemy, detonating for 180% TOTAL damage., Tri-Tip DaggerChance to bleed enemies on hit.
15% (+15% per stack) chance to bleed an enemy for 240% base damage., Ghor's TomeChance on kill to drop a treasure.
4% (+4% on stack) chance on kill to drop a treasure worth $25. Scales over time..

Items which cannot achieve 100% chance, thereby becoming less useful the more negative luck the player has: Stun GrenadeChance to stun on hit.
5% (+5% on stack) chance on hit to stun enemies for 2 seconds., AtG Missile Mk. 1Chance to fire a missile.
10% chance to fire a missile that deals 300% (+300% per stack) TOTAL damage., BandolierChance on kill to drop an ammo pack that resets all skill cooldowns.
18% (+10% per stack) chance on kill to drop an ammo pack that resets all skill cooldowns., Old War StealthkitTurn invisible on taking heavy damage.
Chance on taking damage to gain 40% movement speed and invisibility for 3s (+1.5s per stack). Chance increases the more damage you take., Ukulele...and his music was electric.
25% chance to fire chain lightning for 80% TOTAL damage on up to 3 (+2 per stack) targets within 20m (+2m per stack)., Happiest MaskChance on killing an enemy to summon a ghost.
Killing enemies has a 7% chance to spawn a ghost of the killed enemy with 1500% damage. Lasts 30s (+30s per stack)., Sentient Meat HookChance to hook all nearby enemies.
20% (+20% per stack) chance on hit to fire homing hooks at up to 10 (+5 per stack) enemies for 100% TOTAL damage., Molten PerforatorChance on hit to fire magma balls.
10% chance on hit to call forth 3 magma balls from an enemy, dealing 300% (+300% per stack) damage each., Brittle CrownGain gold on hit... BUT lose gold on getting hit.
30% chance on hit to gain 2 (+2 per stack) gold. Scales over time.

Lose gold on taking damage equal to 100% (+100% per stack) of the maximum health percentage you lost..

Notes

• The luck stat affected by Purity is the same as the one affected by the 57 Leaf CloverLuck is on your side.
  All random effects are rolled +1 (+1 per stack) times for a favorable outcome., and as such, equal stacks of Purity and the clover cancel each other out.
• The flat cooldown reduction of Purity is applied AFTER the reductions of Alien HeadReduces cooldowns for your skills.
  Reduce skill cooldowns by 25% (+25% per stack). and Hardlight AfterburnerAdd 2 extra charges of your Utility skill. Reduce Utility skill cooldown.
  Add +2 (+2 per stack) charges of your Utility skill. Reduces Utility skill cooldown by 33%., making it stack extremely well with them.
• The cooldown reduction can only reduce skills' cooldowns to a minimum 0.5s.
• If p is the probability of a favorable event occurring without any luck modifiers, the probability of the favorable event is p ^ (x + 1) where x is the number of Purities you have.
  • For example, if you have one Purity and two Sticky BombsChance on hit to attach a bomb to enemies.
    5% (+5% per stack) chance on hit to attach a bomb to an enemy, detonating for 180% TOTAL damage., the probability of a bomb without any luck modifiers is 10%. Then the probability of a bomb with one Purity is 0.1 ^ 2 = 1%

Lore

It looks like starseed, tanning in dirt.
It smells like hot stone, and tall grass.
It tastes like spiced fruit, sweet and hot.
It feels like solar winds, and solar chimes.
It sounds like two brothers, chasing glass frogs in the sun.