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Game patch 26.20Data Dragon 16.20.1

Reference patch 16.20.1

Yuumi ARAM · Howling Abyss

A champion-specific Howling Abyss plan with ARAM starting, shopping and teamfight rules. Summoner's Rift roles are not used here.

One shared laneOne-lane Howling Abyss preparation
Champion overview
Review patch unknownRecommendation review pending

These patches track recommendation review, build validation and item lookup separately. Updating item data does not complete a build review.

Recommendation patch
— Data Dragon
Build validation patch
16.19.1 Data Dragon
Item lookup patch
16.20.1 Data Dragon

Howling Abyss rules

Prepare for one shared lane

ARAM removes the normal Rift role map. Build around the champion, the five-player team and the next fight instead.

01
Start together

Review rerolls and the shared bench, then leave with an opening that fits this champion and the team around it.

02
Shop while dead

You cannot Recall to buy. Plan components before leaving the shop and use each death timer deliberately.

03
Share health relics

A relic heals nearby allies after a short delay. Signal it and avoid taking the trigger when a lower-health teammate needs the area.

04
Fight with the wave

Minions create structure pressure and safer space. Clearing first can be more useful than forcing another low-health engage.

ARAM · Howling Abyss

ARAM utility support

Compare the opening with Riot's ARAM Recommended shop before leaving base. After that, purchases happen only while dead; the six usable inventory slots do not increase.

Death-only shopping
S
ARAM opening · separate from item 1

Guardian's Orb

950 gold

An ARAM ability-power starter to compare with the current Recommended shop.

1
Haste Boots

Ionian Boots of Lucidity

900 gold

Adds inexpensive haste and movement for repeated utility casts.

2
Healing and shielding

Moonstone Renewer

2,200 gold

Improves repeated healing and shielding during grouped fights.

3
Team movement

Shurelya's Battlesong

2,200 gold

Helps nearby allies start or leave a fight.

4
Team recovery

Redemption

2,300 gold

Provides a long-range team heal for spread fights.

5
Cleanse option

Mikael's Blessing

2,300 gold

Removes eligible crowd control from one ally; replace it when there is nothing important to cleanse.

6
Final option

Ardent Censer

2,200 gold

Completes the permanent inventory with ally attack speed and on-hit damage when the team can use both.

Buy this only after selling the Guardian starter when all six permanent slots are needed.

Complete build choices

Choose the route before play

Recommendation review pending

AlternativeToo much healingMorellonomicon applies anti-heal. Buy it earlier only when healing is already deciding fights.View full route

Best when: Morellonomicon applies anti-heal. Buy it earlier only when healing is already deciding fights.

  1. Haste BootsIonian Boots of Lucidity
  2. Healing and shieldingMoonstone Renewer
  3. Morellonomicon
  4. Team recoveryRedemption
  5. Cleanse optionMikael's Blessing
  6. Final optionArdent Censer

Buy this only after selling the Guardian starter when all six permanent slots are needed.

AlternativeThey burst meZhonya's stasis can absorb a committed dive or lethal burst window.View full route

Best when: Zhonya's stasis can absorb a committed dive or lethal burst window.

  1. Haste BootsIonian Boots of Lucidity
  2. Healing and shieldingMoonstone Renewer
  3. Zhonya's Hourglass
  4. Team recoveryRedemption
  5. Cleanse optionMikael's Blessing
  6. Final optionArdent Censer

Buy this only after selling the Guardian starter when all six permanent slots are needed.

AlternativeOne spell stops meBanshee's spell shield can protect the first important cast against you.View full route

Best when: Banshee's spell shield can protect the first important cast against you.

  1. Haste BootsIonian Boots of Lucidity
  2. Healing and shieldingMoonstone Renewer
  3. Team movementShurelya's Battlesong
  4. Banshee's Veil
  5. Cleanse optionMikael's Blessing
  6. Final optionArdent Censer

Buy this only after selling the Guardian starter when all six permanent slots are needed.

AlternativeThey stack magic resistVoid Staff becomes valuable when the target has bought meaningful magic resistance.View full route

Best when: Void Staff becomes valuable when the target has bought meaningful magic resistance.

  1. Haste BootsIonian Boots of Lucidity
  2. Healing and shieldingMoonstone Renewer
  3. Team movementShurelya's Battlesong
  4. Void Staff
  5. Cleanse optionMikael's Blessing
  6. Final optionArdent Censer

Buy this only after selling the Guardian starter when all six permanent slots are needed.

Complete build comparison

Complete build comparison

Recommendation review pending

Build review neededARAM utility supportRecommendation review pendingView full route

Recommendation review pending

  1. Haste BootsIonian Boots of Lucidity
  2. Healing and shieldingMoonstone Renewer
  3. Team movementShurelya's Battlesong
  4. Team recoveryRedemption
  5. Cleanse optionMikael's Blessing
  6. Final optionArdent Censer

Buy this only after selling the Guardian starter when all six permanent slots are needed.

AlternativeToo much healingMorellonomicon applies anti-heal. Buy it earlier only when healing is already deciding fights.View full route

Best when: Morellonomicon applies anti-heal. Buy it earlier only when healing is already deciding fights.

  1. Haste BootsIonian Boots of Lucidity
  2. Healing and shieldingMoonstone Renewer
  3. Morellonomicon
  4. Team recoveryRedemption
  5. Cleanse optionMikael's Blessing
  6. Final optionArdent Censer

Buy this only after selling the Guardian starter when all six permanent slots are needed.

AlternativeThey burst meZhonya's stasis can absorb a committed dive or lethal burst window.View full route

Best when: Zhonya's stasis can absorb a committed dive or lethal burst window.

  1. Haste BootsIonian Boots of Lucidity
  2. Healing and shieldingMoonstone Renewer
  3. Zhonya's Hourglass
  4. Team recoveryRedemption
  5. Cleanse optionMikael's Blessing
  6. Final optionArdent Censer

Buy this only after selling the Guardian starter when all six permanent slots are needed.

AlternativeOne spell stops meBanshee's spell shield can protect the first important cast against you.View full route

Best when: Banshee's spell shield can protect the first important cast against you.

  1. Haste BootsIonian Boots of Lucidity
  2. Healing and shieldingMoonstone Renewer
  3. Team movementShurelya's Battlesong
  4. Banshee's Veil
  5. Cleanse optionMikael's Blessing
  6. Final optionArdent Censer

Buy this only after selling the Guardian starter when all six permanent slots are needed.

AlternativeThey stack magic resistVoid Staff becomes valuable when the target has bought meaningful magic resistance.View full route

Best when: Void Staff becomes valuable when the target has bought meaningful magic resistance.

  1. Haste BootsIonian Boots of Lucidity
  2. Healing and shieldingMoonstone Renewer
  3. Team movementShurelya's Battlesong
  4. Void Staff
  5. Cleanse optionMikael's Blessing
  6. Final optionArdent Censer

Buy this only after selling the Guardian starter when all six permanent slots are needed.

Runes and summoner spells

Runes and summoner spellsYuumiHowling Abyss

ARAM removes the attached lane partner pattern. Flash preserves one emergency reposition while Exhaust protects the ally Yuumi joins during a fight.

ARAM
Primary tree

Sorcery

Summon AeryManaflow BandTranscendenceScorch
Secondary tree

Resolve

Font of LifeRevitalize
Summoner spells
FlashExhaust
Protect one ally

Keep Exhaust when one diver can reach the ally Yuumi intends to join. Clarity is an alternative only when the whole composition needs the extra mana.

No permanent attachment

ARAM still requires Yuumi to detach, reposition and select a reachable ally. Flash remains useful when attachment is unavailable or interrupted.

Static alternatives

Compare the problem before changing the plan

These choices are not selected from live scores. Use one only after you identify the stated match problem yourself.

Only when enemy healing is deciding fights

Oblivion Orb

Oblivion Orb supplies healing reduction without committing to a completed Morellonomicon. Skip both when healing is not the problem or an ally already covers your target reliably. Healing reduction does not reduce shields.

Conditional component, not a core item. Complete Morellonomicon only when its stats and slot efficiency justify delaying another purchase.
They burst me

Zhonya's Hourglass

Zhonya's stasis can absorb a committed dive or lethal burst window.

One spell stops me

Banshee's Veil

Banshee's spell shield can protect the first important cast against you.

They stack magic resist

Void Staff

Void Staff becomes valuable when the target has bought meaningful magic resistance.

Situational AP purchase

When should you buy anti-heal?

Buy healing reduction when enemy healing or regeneration is deciding fights and you can keep damaging the relevant target. Grievous Wounds reduces healing; it does not reduce shields, magic damage or crowd control.

Start with the component

Oblivion Orb can provide healing reduction without immediately paying for a completed Morellonomicon. Fit the component around your core damage, mana and survival needs; check the current queue's item tooltip.

Finish when it fits the fight

Complete Morellonomicon when its stats and slot efficiency suit your build. Do not treat it as a mandatory first item just because your champion deals magic damage.

Coordinate coverage

Multiple Grievous Wounds sources do not add their percentages together. Another reliable applier may cover the same target, but you may still need your own source for a separate fight or target.

Repeated spell damage and damage over time can maintain coverage more reliably than a single hit. Match the purchase to your actual spell access, enemy sustain and the teammates who can apply the debuff.

Will the fight last long enough?

If you die before dealing damage, you apply no healing reduction. If your target dies before healing, there is little healing to prevent. The debuff applies on qualifying damage immediately; it does not need to build up. It remains briefly after your last hit, so teammates can benefit even after you disengage.

Only healing during the active debuff counts. For example, 40% reduction prevents 80 of a 200-point heal, or 400 of a 1,000-point heal, before other modifiers. Compare that with the damage, penetration or survival you delayed; neither example guarantees a kill. Healing after the debuff expires is unaffected.

See the Oblivion Orb and Morellonomicon references for current effects and queue availability. These are situational decisions, not a measured best-build claim.

Kit reference

Yuumi abilities

Ability names, descriptions and numeric fields come from Riot Data Dragon. Practical reads are independently written; the current in-game tooltip remains authoritative.

Abilities Data Dragon 16.20.1Cooldown / Cost / Range Data Dragon 16.20.1
P
Passive

Feline Friendship

What it doesPeriodically, when Yuumi strikes a champion with an attack or ability, she restores health to herself and the next ally she Attaches to. While Attached, Yuumi generates a special bond with her allies. The ally with the strongest bond enhances Yuumi's abilities while she is Attached to them.

Practical readFeline Friendship is the always-on rule shaping Yuumi's normal trading and fight pattern. Watch its in-game state before committing.

Q
Q ability

Prowling Projectile

What it doesYuumi fires a missile, dealing damage and slowing first target hit. It deals bonus damage and an enchanced slow if it takes at least 1.35 seconds to get to its target. While on her Best Friend, the slow is always enhanced and grants bonus On-Hit damage to her ally. While Attached, the missile can be controlled with your cursor for a brief period.

Practical readProwling Projectile is a ranged cast involving a slowing effect and basic-attack interaction. Respect its line or target area, and avoid spending it when the opponent can simply step away before the important exchange.

Cooldown6.5 secCost50/55/60/65/70/75Listed range25000 units
W
W ability

You and Me!

What it doesYuumi dashes to a target ally, becoming untargetable from everything except turrets. While on her Best Friend, she gains Heal & Shield Power and grants her Ally On-Hit healing.

Practical readYou and Me! contributes protection or sustain and basic-attack interaction. Its value changes with cooldown, range and target access; recognise the setup before moving into its effective area.

Listed range25000 units
Protection

The protection or sustain is part of the cast's value. Compare its timing with incoming damage rather than reading only the offensive effect.

Movement

The cast changes position or access. Account for where the champion finishes, not only where the ability begins.

E
E ability

Zoomies

What it doesShields Yuumi and boosts Move Speed and Attack Speed. If she's attached, she passes it to her ally instead.

Practical readZoomies contributes basic-attack interaction. Its value changes with cooldown, range and target access; recognise the setup before moving into its effective area.

Cooldown10 secCost80/90/100/110/120Listed range25000 units
Protection

The protection or sustain is part of the cast's value. Compare its timing with incoming damage rather than reading only the offensive effect.

R
Ultimate

Final Chapter

What it doesYuumi channels five waves that damage enemies and heal allies. Yuumi can move, attach, and cast Zoomies! while channeling. While on her Best Friend, this spell also follows her mouse.

Practical readFinal Chapter contributes protection or sustain and damage. Its value changes with cooldown, range and target access; recognise the setup before moving into its effective area.

Cooldown120/110/100 secCost100Listed range1100 units
Cast commitment

This cast has a wind-up, charge or channel. Movement, interruption or a changing target state can matter before the effect completes.

Adapt the plan

What to do when the game changes

Judge the whole lane or map state, not only personal kills. Choose the situation closest to the current game.

Even plan

Trade around health, range and the next wave

1
Wave

Let the team clear without spending every important cooldown at once.

2
Map play

Track the shared lane, brush control and available relics rather than looking for a Rift rotation.

3
Fights

Use the champion's reliable range, protection or control before forcing a low-percentage engage.

Shared-lane plan

Yuumi on Howling Abyss

Read health, range, wave position and respawn timing together. ARAM has no side-lane rotation, neutral-objective setup or normal ward-control loop.

ARAM only
1
Before the fight

Clear or escort the wave, check which allies are alive and preserve enough health to use the champion's reliable range, protection or engage.

2
During the fight

Use the nearest safe target and the team's reachable follow-up. Do not cross the whole enemy formation for a single low-health champion.

3
After the fight

Push with surviving minions, take the safe structure damage available and reset only through a real death rather than donating one alone.

Keep preparing

Stay inside the ARAM ruleset

Compare another champion, review all Howling Abyss builds, or return to the champion overview. Rift lanes and counter-pick claims stay out of this mode.

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