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Senna Build Guide by SlippStream

Support [10.13] Out of the Lantern and into the Fire - Senna Support

By SlippStream | Updated on June 25, 2020
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Runes: Supportive / Easy-to-land skillshots

1 2 3 4
Glacial Augment
Magical Footwear
Biscuit Delivery
Approach Velocity

Presence of Mind
Legend: Alacrity

+1-10% CDR (lvls 1-18)
+9 Adaptive (5.4 AD or 9 AP)
+6 Armor


1 2 3
In the front
LoL Summoner Spell: Flash


LoL Summoner Spell: Ignite


LeagueSpy Logo
Support Role
Ranked # in
Support Role
Win 52%
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Threats & Synergies

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Champion Build Guide

[10.13] Out of the Lantern and into the Fire - Senna Support

By SlippStream
About Me
I am a support main and I've been playing since about halfway through season 9. I normally play more off-meta supports but Senna's playstyle really appealed to me. I hope you enjoy the guide.

Pros / Cons Back to Top


  • Unique support playstyle
  • Has solo kill potential
  • Has decent damage and healing
  • Global ult to turn teamfights across the map
  • Infinite scaling
  • Decent early game and late game
  • Fun to play
  • Versatile runes and build path


  • High banrates
  • Squishy, weak to dives
  • Low crit damage
  • Relies on allies' waveclear to get souls
  • Needs to be aggressive
  • Low mobility
Abilities Back to Top


Senna has a three-part passive, all of which are integral to how she plays.
  • WEAKENED SOUL - Senna's basic attacks and on-hit abilities on enemy champions apply Mist for 4 seconds. Senna's next basic attack on-hit collects the Mist and deals 1% − 16% (based on level) of target's current health bonus physical damage. The same target cannot be collected more than once every few seconds.

    Enemy units that die near Senna have a chance to spawn a Mist Wraith for 8 seconds, increased to 2 Mist Wraiths for epic monsters. Senna can basic attack a Mist Wraith to destroy it, gaining 3 gold and collecting its Mist.
    • Enemy champions and large Monster icon monsters are guaranteed.
    • Large minions that Senna does not kill are guaranteed.
    • Lesser minions and lesser monsters that Senna does not kill have a 22% chance, otherwise a 8.33%.
  • ABSOLUTION - Each stack of Mist grants Senna 0.75 bonus attack damage. For every 20 stacks, Senna also gains 25 bonus range and 15% critical strike chance. Upon exceeding 100% critical strike chance, Senna converts 35% of the excess into lifesteal.

  • RELIC CANNON - Senna basic attacks deal 20% AD bonus physical damage on-hit and grant 10 / 15 / 20% of the target's movement speed as bonus movement speed for 0.5 seconds on-hit. Senna does 35% less critical damage.
This is Senna's engine for her gameplay. Part of her strength is her infinite scaling in her Mist (Souls). Senna will passively get souls in lane while her ADC farms, or off of a leash. Where the bulk of your souls will come from, though, is from double-tapping enemy champions. We'll talk about the best ways to farm souls, but it's important to familiarize yourself with the timing on enemy champion between souls.


After a brief delay, Senna fires a spectral laser in the direction of target unit, healing herself and allied champions in a line, and dealing physical damage to enemy minions and champions in a thinner line.

Upon being struck, enemy turrets, wards, Mist Wraiths, and any other attack-interactive units are considered basic attacked once, while champions and turrets take on-hit effects.

Basic attacks reduce Piercing Darkness' cooldown by 1 second on hit.
As a Senna, this ability is your bread and butter. Whether you're building normal AD, full support, or hypercarry, you will max this ability first. It is a versatile heal and damage attack with insane range. Notably, both your heal and damage scale with AD , and the heal scales with AP as well.

This is also a key part of farming souls, as it picks up all souls hit and works well as a combo after an AA or Last Embrace.


Senna throws a globule of Black Mist in the target direction, dealing physical damage and sticking to the first enemy hit.

After a 1 second delay or if when the target dies, the Black Mist spreads out of the target, rooting them and nearby enemy champions for a few seconds.
Last Embrace will usually be the second ability you max. It's an extremely powerful trading tool during the laning phase as the range is deceptively long, and the flat damage isn't bad. Most of the time, you'll follow up on the root with an AA or a Piercing Darkness to steal a soul.

Remember, you get the root after 1 second or if the target dies (this includes minions). Use this to 1-shot lane minions for an instant AOE root and a great engage or easy getaway.


After a 1 seconds delay, Senna surrounds herself with an aura of mist and gains camouflage for a duration. Senna's basic attacks and abilities briefly remove the effects of camouflage.

Allied champions who enter the mist gain Wraith Form equal to the remaining duration.

WRAITH FORM: Gain camouflage. Enemies will gain obscured vision of the wraiths moving outside of the mist. Performing a basic attack or casting an ability removes Wraith Form, which cannot be regained for 2 seconds.

Senna and allies camouflaged by Curse of the Black Mist also gain 20% bonus movement speed.
Curse of the Black Mist is perhaps Senna's most complicated ability. Firstly, there are two different types of stealth in the ability, camouflage, and Wraith Form. Senna and allies in her radius are fully camouflaged and can't be seen. If Senna's allies leave the radius, they become visible as wraiths. Importantly, the are still unselectable and their identities are masked. Also, if enemy champions enter the radius, only Senna is revealed. You and your allies can be seen with true sight.
You'll primarily be using Curse of the Black Mist as a disengage tool because of the movement speed and untargetability. In lane, use it to protect your carry and make them untargetable, but keep in mind that they will become vulnerable if they attack or use abilities.

Later in the game, use Curse of the Black Mist to obscure your team in fights. Once an ally enters the radius, they become a wraith for the full duration, even if they leave. Use it to keep the number of teammates with you obscured when scouting objectives or entering a fight.


Senna fires two beams of spectral light in the target direction, the center beam deals physical damage to enemy champions hit and afflicts them with Mist.

The broad beam shields Senna and allied champions hit for 3 seconds.[
Dawning Shadow is easily one of the strongest ultimates in the game. Being able to turn teamfights from across the map is incredibly powerful. Of course, this means you'll have to be keeping your eyes on the map and your allies' healthbars post-6, much like Soraka. Even if you don't land the damage beam, the shield could mean the difference for an ally in trouble.

Dawning Shadow's cooldown is excruciatingly long (160 seconds at rank 1), so try not to 'waste' it, but don't use that as an excuse to be too conservative. If you see an enemy recalling with near-0 health, ult them.

Of course, the best application of Dawning Shadow is in teamfights. If you're in the backline (where you should be), it's easy to hit every teammate and most enemies with your ult. Your ult also consumes or applies mist from enemy champions.
Runes Back to Top
Senna has an incredibly versatile set of runes she can take depending on her situation.

Glacial Augment

These are my favorite runes for most of the games I play on Senna. Glacial Augment allows you and your ADC to heavily poke repeatedly in lane and make it easier for you to land your Piercing Darkness, Last Embrace, or even another AA. I recommend these runes if you want to both help your carry and be able to hold your own.

Dark Harvest

These runes are specifically for a botlane matchup you think you can easy bully. Senna can easily get Dark Harvest stacks with help from her ADC, as her AA -> Piercing Darkness combo can quickly double-tap someone below 50%. The damage potential is insane and turns Senna into a scaling beast and a force to be reckoned with late game. If you don't get ahead early, though, things aren't going to get better for you and you'll miss the utility of something like Glacial Augment. I recommend these runes if you think you can aggressively poke your opponents without putting yourself in too much danger.


These runes aren't what I'd normally suggest for someone just starting out on Senna, though I see them frequently on the rift. Aery is good at reliable damage and protection, but doesn't really excel at either. Still, this can be good if you intend on frequently healing your ADC with your Piercing Darkness.
  • Manaflow Band is crucial to stack the mana you'll need to focus-heal your teammmates. As long as you can land 10 Piercing Darkness or Last Embrace early, preferably before first back, you can heal your carry with impunity.
  • Transcendence is a slow burner. Although it doesn't give you anything in lane, your Piercing Darkness will be so spammable mid-late game that it won't matter. Plus, when you're full build, you can scrape some extra adaptive force. Absolute Focus is also a good option but requires great positioning.
  • Lastly, I like to take Gathering Storm. The scaling AF works great with your heal and ult, and it ensures that your infinitely scaling booty gets all the way to late game. You can take Scorch, if you're finding that you just don't do enough damage in lane, but with Summon Aery, you don't really play as a lane bully.


Only recently have these runes been seeing much play on Senna, but they've skyrocketed in popularity. They can help sustain you vs a poke-heavy bot lane and can give you some much-needed presence in lanes where you aren't getting much. These can work in any game but I like to take them if I know my ADC will need some help, but if I also want some more freedom late game.
  • Font of Life is an important part of your sustain kit with these runes. It allows you and your carry to heal when you land a Last Embrace, giving even more healing than you already have and working well with Revitalize
  • Second Wind keeps you healthy through occasional poke, allowing you to go for riskier trades and coming out healthier. However, if you're facing extreme poke, I recommend switching this to Bone Plating to keep you alive in burst trades.
  • I love Revitalize as the final rune here. Not only does it synergize with your Piercing Darkness and Dawning Shadow, but also with the other runes you take. In rare occasions, I can see Overgrowth, but I think the bonus heals and shields are better then the extra health.

Lastly, you'll almost always take precision as a secondary tree for Presence of Mind and Legend: Alacrity. Depending on your primary tree, you can dip into other secondaries once you're comfortable. Some recommendations include domination for Cheap Shot and Zombie Ward, and sorcery for Manaflow Band and Transcendence.
  • Keeps you stocked up on mana for your Piercing Darkness. Especially good in regards to Muramana, but also just lets you spam your abilites more often, increasing your damage output.
  • Gives you scaling attack speed so you can not only pump out more damage and pick up souls quicker, but also reset Piercing Darkness's cooldown faster.
League of Legends Build Guide Author SlippStream
SlippStream Senna Guide
[10.13] Out of the Lantern and into the Fire - Senna Support