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Recommended Items
Runes: Standard - Aery + Revitalize
+8 ability haste
+9 Adaptive (5.4 AD or 9 AP)
+6 Armor
Spells:
Exhaust
Ignite
Items
Threats & Synergies
Leona
Leona is undeniably busted at the moment and will likely stay one of Yuumi's biggest threats for a long time. If you're on her screen, you're too close. Consider asking ADC to take Cleanse over Barrier. Max E and hope your ADC doesn't walk into Zenith Blade. If they're good, you may need to build Mikaels second instead of third.
Veigar
Veigar is one of Yuumi's best matches. With his passive helping her W, they both gain insane amounts of AP. I'd max W second with Veigar. Can be run bot lane, though I that's only viable if your team is 3 AD Jungle/Top/Mid.
Veigar
Veigar is one of Yuumi's best matches. With his passive helping her W, they both gain insane amounts of AP. I'd max W second with Veigar. Can be run bot lane, though I that's only viable if your team is 3 AD Jungle/Top/Mid.
Champion Build Guide



All the other spells don't help you accomplish your win condition nearly as well as these three, so we don't take anything else. There's just no reason to. Strictly better spells - it's no contest.
Passive - Bop N' Block

This is Yuumi's main trading tool that allows her to get gold from her support item, as well as sustain in lane to be able to heal the ADC on the first and second back. Procing this as close to on cooldown as possible is incredibly important, with respect to making sure that you don't get killed for it.
Come late game, the shield has incredible scaling and becomes massive with Aery - It's potentially game changing to be able to get off, proc your shield and hop back onto your carry in the midst of battle, this is likely the hardest mechanial feat on Yuumi, reliably being able to avoid getting one shot by fed endgame carries given the timing to hop back in. :)
Q - Prowling Projectile

This is Yuumi's main poke tool, should you choose to use it. It's incredibly weak in its early levels and scales well, it can do quite a bit of damage if you choose to level it up. If it's level one, it's like .6 damage per mana and not quite worth using if you're not all inning, trying to stop healing or zone - if you're leveling it up first it can hurt quite a bit, though.
W - You and Me!

This is what makes Yuumi the statstick she is. Her ability to anchor herself to a hypercarry and provide support to enable them to do what they do best -- not to mention the whole time she's completely invulnerable to most all effects. There's so many uses for this skill and the fact that you even get to share adaptive force is just insane.
Ideally, your end game with this skill is to stick to the person who will be able to bring home the win - though, more often than not there's a lot of hopping around to be done, be it to reposition onto your tank to ensure a wombo combo or to hop back to save your secondary support, this skill has infinite uses.
E - Zoomies

This is what keeps Yuumi and her ADC in the game to reach where they dominate : an incredibly strong albeit costly heal that when paired with your passive will keep your 1v2 lane going long enough for your hypercarry to be able to properly kill the whole team. At no point in the game is this a bad ability and it never stops getting better due to its amazing scaling. Slamming this ability onto your ADC gives them the health and attack speed steroid required to turn fights and demolish frontlines.
Hopping around and saving your team can often be the right decision, but when you use this ability you need to be aware of it's relatively long cooldown and the fact that if you're saving someone who isn't your ADC, you may inadvertently be putting your ADC in a spot of weakness where you could just lose the game. Judgement can be tricky, but that's the name of the game with Yuumi - realizing your win condition.
Oh, and not to mention when you use it lategame you move faster than most champions in the game. Who needs boots?
I'm a firm believer that the best way to play Yuumi is as a fully supportive cat, and this ability is the best way to stay in the game until you're out scaling properly, hence why I always max it first no matter who i'm on or what i'm playing against. Survivability is key.
Ultimate - Final Chapter

Finally, Yuumi's ultimate - more often than not, her saving grace and an ability that'll be able to turn fights, help you escape when you shouldn't be able to and of course, set up absolutely disgusting teamfight wombos with champions like orianna and malphite. Deciding if you want to use this ability to engage or to peel for your ADC will often be the decision that leads you to a win or a loss.
Since this ability comes in waves, spell shields and fiora's Riposte are unable to stop it from rooting - Even if the 3rd wave is blocked for fiora, the 4th wave that hits will stun, same with spell shields.
With such a short cooldown, more often than not there isn't a reason to hold onto it - every single Yuumi build gets max CDR in the first few items and with a the low base cooldown you shouldn't feel the need to hold onto it if you think you might even slightly need it.
If you're going to ult, if possible try to fire off Q and passive proc first, though often this isn't an option - can't do either while casting so best to put them on cooldown first.

Let's quickly go over why every rune is where it is!
Meta Runes : If these aren't in your build, something's probably wrong.



And lastly, the scaling CDR stat rune - this rune is incredibly powerful regardless of if you're running Transcendence or not, the only time i ever wouldn't take this rune is if i knew for a fact I was trying to get early game cheese, which if I knew that from champ select I.. wouldn't pick Yuumi. So this rune is a constant.
A Tier : Runes that should be 80%+ of every Yuumi's build.








And finally, the adaptive force stat rune - this is what you'll be taking in your secondary option slot, ideally the first being taken by CDR.
On to C Tier - runes that are quite unoptimal to straight up bad and I can't really ever recommend taking.
Firstly,








Lastly, the stat runes - Health and armor! You will be taking one of these as your last option stat rune in every game. I reccomend armor, as Yuumi is one squishy baby. Either is fine though.
On to D tier - these are runes that if you're taking, you're either trolling your premades and having some fun in norms, or incredibly confused.








And the stat rune - the MR isn't really ever worth taking unless they have like straight up 5 ap. You're going to only be taking damage from auto attacks 99% of the time, MAYBE some ap from supports in lane but they'll be autoing you too - just take the armor.
And finally, the rest of the runes. These aren't even worth talking about. Don't even think about it.
Keeping your ADC or chosen laner alive is more important than anything, and while playing League of KDA is fun and all it's far, far more important to make sure your carry is in the best position available to them - more often than not, this means carving a path through the enemy team with your body or your life as a whole, maybe being used as bait so they can escape or whatever else, don't be afraid to die for the person who you're trusting the game to. Your life isn't worth it, theirs is.
Be it from sitting on your tank to get deep wards, sitting on your fed talon and camping the enemy blue buff, or maybe taking a risk and hopping on you 1/3 illaoi top who's sitting on 10/cs a minute.
Yuumi's not so much about mechanics, she isn't one for fancy plays, but Yuumi sure as hell shows all about how whoever's piloting her and their judgment - this could be showing how you're able to track the jungler and ward safely, maybe it's knowing how much damage your carries do at any point and time and shotcalling fights, maybe it's even doing something as simple as just hopping on and off someone to re-trigger aery and save their life from ignite while your heal is down at level 2.
There are lots of kinds of Yuumi players, and most of them are very similar, but when it comes down to it, a good Yuumi does shine through like any other champion's main would.
These are also covered if you hover over the notes in the item build.
Core items
These are items that will be in nearly if not every one of your item builds.










Trap items
Items you shouldn't buy, something to consider is these items CAN NOT replace your core items without a serious downgrade in build quality or have to be your 6th item - both of which are just bad.




Do not build this in normal Yuumi or i'll cry. Full ap or don't buy this, p l e a s e.




The biggest problem with this is that you're almost always going to be behind if you're playing bottom lane against an equally skilled duo with a more, say, active support - and there is an absolutely massive problem with this, being that while your adc might be behind, they might be your duo, it's INCREDIBLY important to know when you need to abandon them. This is something that's I think without a doubt the hardest part about playing this champion, being able to realize who is and what your win condition is, do you stay on your ADC in hopes they pull through and win that crucial 2v1 bottom lane and pull it back in? Or do you abandon your ADC to farm in the solo lane, hope they don't get dived and sit on your midlaner, who's two kills up and itching to fight?
Lots of people always complain to me, 'oh, but you're taking my exp!' This really saddens me, a good Yuumi will always outweigh the EXP differential you'd be up if you were alone.
More often than not, you'll likely have to decide between possibly upsetting your ADC who feels like they've been figuratively (and literally) left for dead, or sticking on something that you believe isn't going to be able to win you the game. Does your ADC have the mental state to keep playing if you leave, or will they tilt? It's incredibly important to be able to read your team and tell if you're going to be tilting them, as if you leave to go to a different lane and you might just make your ADC mental boom -- game's likely over regardless of how well top or mid is doing if that happens.
Really, when it comes down to it, if you're playing with your friends in a normal game, don't do stuff that's gonna upset them. If you know that you're going to be ruining your friend's game just because you don't like the way they're playing, then just don't play Yuumi. Don't be that guy.
Similarly, if you're playing ranked, you need to realize that while you might be matched with people, that you're still an individual champion - you need to make your own decisions if you want to try to climb. Don't let people get to you if they're telling you how to build, what to do, anything like that. Do your own thing unless you feel like it's going to cost you the game, following your gut is super important.
Whenever I'm playing with my duo, the phrasing usually is such like 'Do you value winning more than fun?' and of course, his answer is yes - we're at an understanding that he might not have fun, he might have to take the back seat, but all in all that's going to give us the best chance to win. If you can, definitely find people with similar understanding. Yuumi is such a fun champion to play, yet if you're playing alone it's often overwhelmingly unfun for one or more players on the team if you aren't careful.
A : If you're sitting on the jungler, you're losing out on precious EXP that you need to do what you do best - scale! Jungle camps aren't shared EXP, You're better off sitting on literally any laner.
Q : Can Yuumi roam?
A : By herself? No. If you're caught out by any champion at any point walking between lanes you're likely dead. The only time you should be by yourself is if you're 100% sure you know where it's warded, where it's not, and where the ENTIRE enemy team is. If you don't know these three things, you shouldn't be walking between lanes or warding, nothing like that.
Q : Why should I pick Yuumi?
A : Honestly? You probably shouldn't right now unless you're just wanting to have fun or you have a competent duo - Yuumi isn't a someone you can easily climb with because of how little impact you have directly onto the game. If you're playing Yuumi, it's quite likely you're either the best or worst player in the game.
A : @Eunsaur on instagram !
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