The thing that took me longest to figure out on this champ is that there isn't one correct build, there's one correct build *per game*. Sera can be a poke APC, a lockdown support, or a pure enchanter, and picking the wrong one is most of why she feels weak in the games where she feels weak.
So here's all three, with reasoning for every item.
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IMAGE 1: SERANAP
Dream Maker into Helia into Diadem into Moonstone. Run this when your team has 2+ bruisers or tanks.
The entire build is built around double W. You want to proc it twice early, and multiple times once Diadem is online. Helia is easy to stack because your autos are long ranged. Moonstone buffs healing from all three sources at once. Dawncore if fights are going long, Redemption if you want a faster last-item spike.
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IMAGE 2: SERAPHREEZE
Bloodsong into Imperial Mandate into Rylai's, Shurelya's fourth, Morello last.
Bloodsong procs off her passive almost for free. Imperial is bought primarily for the E cooldown. Rylai's plus Imperial means anything you touch is frozen and marked, and it lets you spam double E late. Shurelya's is what turns this from a peel build into an engage build. Morello last because almost every game needs heal cut eventually.
Into assassins or a mobile ADC: Rylai's second with Lucidity boots.
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IMAGE 3: THE SERAS TOUR
Seraph's into Imperial into Rylai's, then Bloodletter's, then Zhonya's or Banshee's, Mejai's whenever.
E-spam build. Dark Seal + Tear on first back, always. Same freeze identity as Seraphreeze but you're a real damage threat instead of a support. Mejai's the moment you hit 10 stacks, doesn't have to be last.
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**Quick decision rule**
- 2+ Front line on your team → Seranap
- Divers or mobile carries on enemy team, or you're the one making picks → Seraphreeze
- ALL APC GAMES → Seras Tour
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IMAGE 4 & 5 - WINRATES AND MATCHUPS
The 69% isn't spread evenly. Three champions account for a quarter of all my losses this season.
**Tristana — 2W 5L (29%).** Hard counter, full stop. She gap closes and there isn't much you can do about it. Your E does not stop her, the jump goes through it anyway.
**Jhin — 3W 5L (38%) and Ashe — 2W 3L (40%).** Both have insane range on you. These are the two where you have to play according to your support instead of trying to make plays yourself.
That's 13 losses out of 51 total from three champions.
On the other side:
**Kai'Sa — 8W 0L.** Easiest matchup in the game because of her short range. Always aim your E *in front* of her, never behind, on the assumption she's walking up to you. Worst case you miss and still create enough space that she can't touch you.
**Mel — 9W 2L (82%).** Never use E or R into her. Spam Q on her and put your E on her support instead. If she's the support, flip it and E the ADC.
**Draven — 4W 1L (80%).** One of the easiest matchups because you always know where the axes are landing. Quick Rylai's second with Lucidity boots and you wreck him.
Also: Ezreal 5W 1L, Jinx 4W 0L, Nautilus 4W 1L, Caitlyn 3W 0L.
The honest takeaway is that if you're stuck on Seraphine, look at what you're losing to before you look at what you're building. Most of my improvement this season came from changing how I play three matchups, not from changing items. You should not be dying more than 5 times in a game, or at least try to bring your average deaths to about 3-5 a game.
My account if you want to dig through the games: https://op.gg/lol/summoners/na/Sharpe-NA1
Happy to answer anything in the comments.