An update for Kai'sa, making her less of an all-encompassing safe pick and more of an assassin.

Passive: Second Skin

Caustic Wounds

• Expunge damage changed from 15 (+2.5 per 100 AP)% of target's missing HP to 40-100 (+25% AP), increased based on missing HP up to 80-200 (+50% AP) at 25% HP.

Living Weapon

• Abilities are no longer upgraded based on purchased stats.
• Abilities are now upgraded based on successful usage.
• Land 300 Icathian Rain missiles on enemy champions to upgrade the ability.
• Land 50 Void Seekers on enemy champions to upgrade the ability.
• Attack enemy champions 100 times while under the effects of Supercharge to upgrade the ability.
• [New] Can upgrade Killer Instinct by scoring 10 kills on Killer Instinct targets within 10 seconds of casting the ability.
• Upgrades no longer require a channel, and can be activated in combat.
• You are restricted to one upgrade, plus another one for each level of Killer Instinct.

R: Killer Instinct

• Passively allows an additional 1/2/3 Living Weapon upgrades.
• Range adjusted from 1500/2000/2500 to 2000
• Shield strength adjusted from 75/100/125 (+100/150/200% AD) (+75% AP) to 75/100/125 (+125% AP).
• Upgrade: Killer Instinct has its CD refreshed if the target dies within 10 seconds.