Seraphine the best way to play this champ if u have people who A can give u shield B can root or mostly can CC just like Morgana with your E ability Beat Drop and you W ability Surround Sound u can hard CC them and heal your friends when some one gives you Shield that's why if u ask me Rakan would be the greatest double support (or if your going APC then great support i quess) both of you whould be great team with your Beat Drop and Rakan hitting his Grand Entrance when he hits that and u hit after that both of u may do SO MUCH damage even if you do not root him u still slow and knocking up them u still do very good damage and with Rakans E Battle Dance and your W Surround Sound u can heal both of u. And with Seraphine Encore and Rakan The Quickness both of u can make the enemy not able to run away what is pretty good if u get jg to help you or make the enemy force to stay under turret what will or will not make him die faster by a turret. Ornn if u have him u should buy Rabadon's Deathcap ask him to upgrade it if Some of your team mates does not know how Ornn Passive Living Forge then take it but if there a person who knows hes Passive and is fed or better doing damage then be patience...
If u have any champs that gives u Shield to your HP or has Summon Aery and they can heal your team with your W Surround Sound u shall getting the HEAL!
Stage Presence Ok Ok. When you are alone or out of team fight and u do not have your moves background in yellow what is passive Stage Presence on your moves when u get them into "yellow" that's means when u cast one move even more to cast again. meaning that your moves does extra damage or extra heal appends what move you use like Beat Drop can root enemy when hit twice and if your W Surround Sound you can heal yourself and your team mates its like Redemption but u can move, of course its not better than Redemption but at least u can give your team more shield at it meaning that your ADC can at least live longer till he DIES your Q High Note its not that much difference but does so many times to the enemy if hit twice what actually is great for poking your enemy in your lane.
(This is just thinks what i can tell right now. So soon i can tell ya pro and cons stuff EVEN MORE!!!

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How to use your E

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When u see thison the enemy USE your E move Beat Drop to make the enemy A) get Rooted if there's only one note aka enemy has been slowed B) if the enemy is already immobilized or Grounded they get stunned making you get change of killing the enemy. If u wanna make your E to be a root move and not slow take Rylai's Crystal Scepter for that, cus the move makes your E to be root cus the items passive makes it slow.
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If u ask me the Summon Aery, Manaflow Band, Transcendence, Scorch, Presence of Mind And Cut Down Are the best to have by Seraphine to have if u ask me mostly cus u dont then need Tear of the Goddess cus u already get so many mana by this rune. Mostly Summon Aery is the best 2v2 fights with your W and your Aery u help so much your ADC to survive and not die by giving you more change of winning the lane ofcourse u can take Guardian for yourself to make your friend not die mostly i don't recommend cus Summon Aery is already a good rune for Seraphine but u do u. The Reason to take Cut Down as Seraphine is because u are mostly going to be not that much hp while enemy may or may not be higher hp than u of course u can change it with Coup de Grace if u really want to if u are going to Resolve in your rune i recommend to take Demolish and Revitalize, u can take Font of Life or Shield Bash my opinion is to take Revitalize and Demolish or Font of Life because Shield Bash Ain't that great mostly and Demolish can give u faster to break the enemy turret and Font of Life Can give u more change of winning your lane in bot lane and Revitalize can give your friend more shield with your W Surround Sound to make more % to win your lane

its sometimes rare to have Ornn in your team because of technical reasons but when you have him in your team i recommend you to buy Imperial Mandate, Moonstone Renewer Or Luden's Tempest when playing Seraphine what i highly recommend to have Imperial cus u mostly do CC of more and like in this preseason and future season Ornn can only Upgrade all mystic items only and yeah. but MR and IM does not have stats diff when upgraded, But Luden's have changed to better so thake it if u going to POKE or Mid lane then take Luden's Tempest How does Ornn Passive Work? Living Forge secondary passive start when he is level 13 he cant upgrade your item yet till he is level 14 but just to remind u he can only upgrade 1 out of time so that's means 1 upgrade per champ besides Ornn he gets 1 upgrades he can start upgrading the team in 14-17 and also he getS 4% more ARMOR, Maggic Resist and HP Ornn upgrades only mystic items only. Ornn . i put this info down cus to let you know how Ornn passive really works and because i just can :)

Now there's now brand new items and deleted items so in next moth mostly this will or will not be finished

This ain't Finnish yet mostly because Seraphine just got released so yeah and i'm trying my best to make this guide good (what is maybe not great)to be the best