Feline Friendship (Passive)

STATIC COOLDOWN: 20 – 8 (based on level)

Innate: Periodically, Yuumi's next basic attack, which has an uncancelable windup and gains 50 bonus range, ability hit against enemy champions, or Final Chapter hit on ally champions while attached, will heal her for 20 – 110 (based on level) (+ 25% AP). If she is attached to an ally or does so within 4 seconds, they are healed for the same amount.

Innate: While attached to an ally, Yuumi grants them 2 permanent Friendship stacks whenever they kill enemy champions or minions. The ally with the highest Friendship stacks becomes Yuumi's Best Friend, which empowers her abilities with additional effects while she is attached to them.

Feline Friendship will not be consumed if Yuumi isn't missing health, except when triggered by a basic attack. While attached, it won't be consumed if both Yuumi and her anchor aren't missing health.

Prowling Projectile (Q)

COST: 50 / 55 / 60 / 65 / 70 / 75 Mana
COOLDOWN: 6.5

Active: Yuumi fires an errant missile in the target direction that deals magic damage to the first enemy hit. If the target is a champion, they are also revealed and slowed by 20% for 1 second.

Attached Bonus: Yuumi channels for up to 1.35 seconds to steer the missile at a slower speed. After being in flight for the same duration, the missile accelerates in its current direction to deal increased damage and apply a stronger slow against champions that decays to 20% over 2 seconds.

Best Friend Bonus: Prowling Projectile always applies its enhanced slow against champions and hitting a champion grants her Best Friend bonus magic damage on-hit for 5 seconds, increased by 0% – 75% (based on Anchor's critical strike chance).

Magic Damage: 60 / 95 / 130 / 165 / 200 / 235 (+ 20% AP)
Increased Damage: 80 / 140 / 200 / 260 / 320 / 380 (+ 30% AP)
Enhanced Slow: 50 / 53 / 56 / 59 / 62 / 65%
Bonus Magic Damage On-Hit: 10 / 12 / 14 / 16 / 18 / 20 (+ 5% AP)

You and Me! (W)

STATIC COOLDOWN: 10 / 5 / 0 (based on level)

Passive: While Yuumi is attached, she is untargetable (except by turrets and inbound projectiles) and casts her abilities from the Anchor's position, empowering them with additional effects.

Active: Yuumi channels for 0.25 seconds, then upon completion dashes to the target allied champion and attaches to them upon arrival, designating them as her Anchor. You and Me! can be recast after 0.5 seconds of the attachment.

Recast - Change of Plan: Yuumi detaches from her Anchor and dashes to the target allied champion to attach to them, refreshing the recast. She will detach automatically if her Anchor dies or under certain circumstances. If recast without a valid target, Yuumi will detach and dash 250-units in the target direction, placing You and Me! on a 0.25-second cooldown if it is not already on cooldown.

Yuumi will be knocked down by any immobilizing or polymorphing crowd control during the dash.

Yuumi starts with a skill point in You and Me! and Prowling Projectile instead has 6 ranks.

Best Friend Bonus: Yuumi gains heal and shield power and her Best Friend gains healing on-hit.

You and Me! is placed on a 5-second cooldown if Yuumi becomes immobilized, grounded, or polymorphed.

Heal and Shield Power: 5 / 7.5 / 10 / 12.5 / 15%
Healing On-Hit: 3 / 5 / 7 / 9 / 11 (+ 4% AP)

Zoomies (E)

COST: 80 / 90 / 100 / 110 / 120 Mana
COOLDOWN: 10

Active: Yuumi grants herself a shield and gains bonus attack speed for 3 seconds. She also gains 20% bonus movement speed while the shield holds.

Attached Bonus: Zoomies affects the Anchor instead of Yuumi and additionally restores mana to the Anchor, increased by 0% – 100% (based on Anchor's missing mana).

Shield: 65 / 90 / 115 / 140 / 165 (+ 30% AP)
Bonus Attack Speed: 25 / 27.5 / 30 / 32.5 / 35% (+ 8% per 100 AP)
Minimum Mana Restored: 20 / 24 / 28 / 32 / 36
Maximum Mana Restored: 40 / 48 / 56 / 64 / 72

Final Chapter (R)

Active: Yuumi and Book channel for up to 3.5 seconds, during which they are ghosted, to launch 5 magical waves in the target direction.

Allied champions hit by the waves are healed, with each heal instance beyond maximum health being converted into a shield that lasts for 1.5 seconds plus the remaining channel duration instead.

Enemies struck by the waves take magic damage and are slowed by 10% for 1.25 seconds. The slow stacks and refreshes on subsequent hits, up to a total strength of 50%. Subsequent waves against enemies hit deal 25% damage.

Attached Bonus: Yuumi can steer the direction of the waves if initially cast while attached. Detaching causes her to lose this bonus for the duration. Additionally, Feline Friendship can trigger from also hitting allied champions.

Best Friend Bonus: Final Chapter's heal to the Best Friend is increased by 30%.

Heal per Hit: 30 / 40 / 50 (+ 15% AP)
Best Friend Heal per Hit: 39 / 52 / 65 (+ 19.5% AP)
Total Heal: 150 / 200 / 250 (+ 75% AP)
Best Friend Total Heal: 195 / 260 / 325 (+ 97.5% AP)
Magic Damage per Hit: 75 / 125 / 175 (+ 25% AP)
Total Magic Damage: 150 / 250 / 350 (+ 50% AP)