Ever wondered if that sleek sword from Sumeru could fix your energy headaches in Genshin Impact? Xiphos' Moonlight dishes out up to 72% ER to the wielder and a solid 21.6% to the whole team at R5 with 1000 EM. For Kazuha, it pushes him to 170-270% ER, keeping his Burst humming non-stop in Swirl-heavy squads. Nilou? She hits 180%+ ER in Bloom setups, cranking up those core damages. If you're running reaction comps, slap it on Kazuha first—calcs and rotations back this up every time.
Breaking Down Xiphos' Moonlight: Stats, That Passive, and How the ER Magic Flows
Picture this: a weapon with 510 base ATK and 165 EM at level 90. Not bad, right? The passive, Jinni's Whisper, kicks in with 0.036% ER per point of EM every 10 seconds, lasting 12 seconds on the wielder— and 30% of that spills over to your team. It works off-field, stacks up to twice, and honestly, it's a game-changer for supports who dip in and out.
At R1 with 800 EM, you're looking at 28.8% ER for yourself and 8.64% team-wide. Bump to R5 and 1000 EM, and it jumps to 72% self and 21.6% team, assuming 90% uptime in those 20-second rotations we all love. Refinements scale nicely: R1 at 0.036%, R2 at 0.045%, up to R5's 0.072%. That means R5 pumps out 43.2% more ER than R1 at 1000 EM, shaving 20-30% off your Burst cooldowns.
To really milk this passive—equip it on an off-field hero like Kazuha right after his Skill. Stack at least 800 EM for that 28.8% at R1. And time your swaps with the 10-second cooldown for 90% uptime in 15-20 second loops. It dropped in Version 3.1 Phase 2 on October 14, 2022, with reruns in 4.8 (July 17-August 6, 2024) and 5.7 Phase 1 (June 18-July 8, 2025). Ascension's a grind: 150,000 Mora, plus Faded Red Satin (10), Trimmed Red Silk (15), Rich Red Brocade (18), those Talismans of the Forest Dew (3/9/9/4), and Prism stuff (15/18/27) from Sumeru domains.
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Kazuha's Energy Crunch: What He Really Needs and Why It Matters
Kazuha's Burst? 60 Energy, 18 seconds of glory. At C0, he wants 170-215% ER to keep it off cooldown in off-field roles; C1 drops that to 120-150%. His Skill on hold spits out 2-3 Anemo particles every 9 seconds—funnel 'em right, and that's 3-4 Energy per second. EM-focused builds often land at 130-150% ER sans extra sources.
Slip him into 4-piece Viridescent Venerer (VV), and artifact ER averages 40-50% with subs, but non-Anemo teams? Expect 10-15 second Burst gaps. National variant with Xiangling? Shoot for 180% ER on her particles. Taser with Fischl? Resonance adds 20% ER, handling 60-70% of the load.
How to nail the baseline: Calc in-game for 200% ER in Abyss floors. End rotations with his Skill to funnel particles. If you've got C4, glide for +2 ER per second—bumps effective ER by 10-15%. At level 90, base stats are 13,348 HP, 297 ATK, 807 DEF, and 115 EM from ascension. Poetics of Fuubutsu? 0.04% Elemental DMG Bonus per EM on Swirl—up to 40% at 1000 EM. Ascension materials: Vayuda Turquoise (1/9/9/6), Treasure Hoarder Insignia (18/30/36), Sea Ganoderma (168), Marionette Core (46), and 420,000 Mora.
(Quick editor aside: I've farmed those Sea Ganoderma spots near the coast a dozen times—tedious, but Kazuha's worth it.)
Kazuha Rocking Xiphos' Moonlight: The Real Performance Scoop
Hit 900-1000 EM, and Xiphos delivers 32.4-36% self ER at R1, plus 9.7-10.8% to the team. Total? 170% ER without an ER sands, full Burst uptime locked in. Sample math: Base 100% + Xiphos 36% + VV subs 34% = 170% ER, cutting downtime by 20-30%.
In National (Kazuha, Xiangling, Xingqiu, Bennett), that 10.8% ER juices Xiangling's 80-cost Burst every cycle, pumping Vaporize damage 60% higher via VV shred. Taser with Nilou? Keeps Fischl's Oz rolling, netting 15-20% team DPS uplift.
Artifact game: EM sands/goblet/circlet at 46.6% each, subs ER > EM > CRIT/ATK for 1000 EM and 200% ER. Level Xiphos to 90 for the 165 EM. Farm VV with 20+ EM subs. Test R5 at 1000 EM: Base 100% + artifacts 100% + Xiphos 72% = 272% ER. Beats Iron Sting (165 EM, zero ER) by solving energy woes; over Favonius (6 Energy on 60% Crit), no RNG, full EM, and 40% DMG from Poetics.
Talents: Burst first (262% Anemo DMG + 120% DoT), then Skill hold (261% grouping), Normals last. Rotation? Hold Skill to Swirl elements. Burst for -40% RES shred. Swap out—Xiphos ticks off-field.
Nilou's Energy Hurdles: Baseline and Why She's Thirsty
Nilou's Burst guzzles 80 Energy, 20-second CD. In Bloom teams with Hydro backup, minimum 180% ER; solo, over 200%. Every-other rotation? 120-150%. Skill costs 25 Energy every 15 seconds, generating 2 Hydro particles; off-field Whirling Steps needs team funneling for 3-4 Energy per loop.
Bloom with Nahida? Low ER means 5-10 second delays. HP builds average 130% ER from subs; hybrid EM ramps up the thirst. Triple Hydro with Kokomi? 20% ER resonance, aiming for 160%.
Steps to baseline: Push 60k+ HP (max 74k for 400% Bountiful Core DMG). 2-piece Vourukasha's Glow for +20% HP healing. ER subs on sands if no sharing. Level 90 bases: 15,185 HP (28.8% ascension), 230 ATK, 729 DEF. Passives: Court of Dancing Petals (+100 EM on Dendro in Hydro+Dendro); Dreamy Dance of Aeons (9% Core DMG per 1k HP over 30k, max 400%). Ascension: Varunada Lazurite (1/9/9/6), Fungal Spores (18/30/36), Padisarah (168), Perpetual Caliber (46), 420,000 Mora.
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Nilou with Xiphos' Moonlight: Does It Bloom or Flop?
Hybrid 400-600 EM setup? Xiphos gives 14.4-21.6% self ER at R1, 4.3-6.5% team—hits 180% total, plus 165 EM for 20% better Bloom ownership. At R5/800 EM: 57.6% self + artifacts 122.4% = 180% for every-rotation Burst in 3-Hydro.
Versus Key of Khaj-Nisut (66.2% HP, EM from HP), Xiphos edges out with team ER, no battery needed—boosts cores 15-25% via EM, especially Kazuha Swirls adding +100 EM. Triple Hydro Bloom (Nilou, Nahida, Kokomi, Dendro Traveler): 6.5% team ER helps Nahida's 70-cost Burst, upping Dendro Cores 20% for 400% DMG at 70k HP.
Artifacts: 2-piece Tenacity + 2-piece Vourukasha's Glow, HP% or ER sands (46.6%), HP% goblet/circlet (46.6%), subs HP% > ER > EM. Rotation: Triple Skill in Whirling Steps for off-field Hydro (Lingering Aeon). Burst AoE if ER's good. Swap to Dendro for Blooms; Xiphos EM amps Dendro on cores. Talents: Skill > Burst > Normal. For F2P Nilou sans signature, it tops Sacrificial Sword (80% CD reset R5) in tight energy spots.
(Editor view: Nilou's dance feels magical with this—I've seen it turn sloppy Blooms into core explosions that clear rooms.)
Kazuha vs. Nilou: Who Wins the Xiphos Crown?
Let's stack 'em up, based on the data.
ER Sharing Punch: R5/1000 EM gives Kazuha 72% self/21.6% team for 40% DMG buffs. Nilou at 800 EM? 57.6% self/17.3% team, covers 180% but caps core DMG at 20% thanks to HP focus.
Personal Perks: Kazuha wipes 20-30% Burst downtime sans C1/C2. Nilou cuts 15-25% delays in Blooms, but HP weapons scale better to 400%—Kazuha takes the edge overall.
Team Fit: Kazuha thrives in Swirl-Vaporize (say, with Arlecchino). Nilou owns Dendro-Hydro (Nahida crew), where Kazuha's Xiphos indirectly buffs her.
Priority Call: Kazuha first for meta support. Nilou if no Key—refine to R3 for 50%+ ER.
C2 Kazuha (+200 party EM) hits 1200 EM total (48% ER R1). Nilou C2 (-35% RES) amps EM without leaning hard on Xiphos.
Other Weapons in the Mix: Smart Swaps for Kazuha and Nilou
Kazuha Options: Xiphos trumps Iron Sting (165 EM, +12% DMG stacks, no ER) for reliable uptime. Over Freedom-Sworn (198 EM, +20% party ATK), ER wins in low-investment runs. Favonius? Ditch the particle RNG for 915 EM and 36.6% buffs.
Nilou Picks: Xiphos edges Sapwood Blade (EM on Dendro hits) with ER. Key of Khaj-Nisut rules (HP/EM hybrid), but Xiphos shares in F2P.
Budget Hacks: Craft Iron Sting for EM if pulls are dry. Festering Desire (45.9% ER) rivals for Nilou's Skill.
Swap Smarts: Xiphos on Kazuha for hungry teams; Favonius for battery particle gen.
Xiphos? Top-tier for C0 Kazuha, skips C6 needs; mid for Nilou in 3H1D.
Teams That Make Xiphos Sing
Kazuha Squads: National (Kazuha-Xiphos, Xiangling, Xingqiu, Bennett) for Vaporize—ER covers 80-cost Bursts. Taser (Beidou included) loves 21.6% team ER at R5.
Nilou Crews: Bloom (Nilou, Nahida, Kokomi, Dendro Traveler)—Xiphos on Kazuha adds Swirl (-40% RES, +100 EM). Triple Hydro leans on ER for core procs.
Energy Vampires: Buffs Arlecchino (80 Energy) or Kokomi (70).
Best Spots: Multi-target Abyss? Kazuha groups + Xiphos uptime. Single-target? Nilou's AoE cores with shared ER.
Rotation example: Kazuha Skill/Burst > Nilou Skill > Dendro trigger > Kokomi Burst. Double setups stack Xiphos to 144% ER.
Pitfalls to Dodge and Pro Tips
Don't buy the myth—ER sharing isn't a cure-all. Kazuha's low base laps it up more than Nilou's HP grind; test at 800 EM min.
Overdo EM? Balance to 170% ER base. Slap on 4pc Emblem for +20% if under 200%.
Skip funneling? End with Kazuha for particles; watch 10s triggers.
Refinement rabbit hole: R1's fine at 28.8% ER; R5's Abyss gold at 72%, but talents first.
Subs shift: After Xiphos, swap ER sands to EM/HP; no Crit on supports.
Pro moves: Gilded Dreams pairs for +230 EM synergy. 2-Hydro for Nilou ownership. Steer clear of static auras killing Swirl.
Build Blueprints and Quick Calcs
Kazuha EM Setup: Lv90 Xiphos R1, VV 4pc (EM mains 46.6% each, subs +200 EM/100 ER). Totals 1000 EM, 200% ER. Poetics 40% DMG, VV 60% Swirl; 100% uptime.
Nilou Hybrid: Lv90 Xiphos R5, 2pc Tenacity + 2pc Vourukasha (HP sands 46.6%, HP goblet/circlet 46.6%). 60k HP, 180% ER; 400% core +165 EM.
Team ER Formula: Wielder EM x 0.072% (R5) x 0.9 uptime x 0.3 share = team ER. 1000 EM? 21.6%.
Rotation Sketch: 15s loop: Kazuha hold Skill (3 particles) > Burst > Nilou Whirling x3 > Dendro Skill. Xiphos fills 65% ER gap.
Where to Invest and My Final Take
Xiphos screams priority for Kazuha—C0 meta without cons. Nilou's a solid secondary for F2P Bloom. Early game? Craft Iron Sting. Late? R5 refine for 72% ER in Abyss. Beats other 4-stars on 5.7 banners (June 18-July 8, 2025). Stick it on Kazuha for reaction teams—max value.
FAQ
Does Xiphos' Moonlight work well on Kazuha?
Absolutely—36% self ER at R1/1000 EM totals 170%, full Burst in National. VV 4pc, EM mains, ER subs to 200%. Hold Skill for groups; skips Favonius RNG.
Is Xiphos' Moonlight good for Nilou?
Yeah, for HP/EM hybrid in Bloom—165 EM ups core DMG 20%, 57.6% ER at R5/800 EM hits 180%. Key's better for HP, but F2P 3H1D Nilou? Whirling x3 > Dendro for Bountiful Cores.
How does Xiphos' Moonlight ER sharing work?
Off-field every 10s: 0.036% ER per EM (R1) for 12s to wielder, 30% team; stacks for 90% uptime. 1000 EM R5 = 72% self/21.6% team. Off-field supports like Kazuha, swap post-Skill for 15-20s rotations.
Who benefits most from Xiphos' Moonlight passive?
Kazuha, as EM/ER hybrid—20-30% Burst uptime, 40% DMG at 1000 EM, no sands. Nilou next (15-25% Blooms via EM). Kazuha in reactions, R3+ for 50%+ Abyss ER.
Should I use Xiphos or Iron Sting on Kazuha?
Xiphos, for 28.8% self ER at R1/800 EM over none—full EM sands, team buffs sans battery. Iron Sting's pure F2P EM (165 +12% DMG) but downtime; VV to 200% ER for Swirl.
Can Xiphos solve Nilou's energy problems?
Kinda—21.6% team ER at R5/1000 EM on Kazuha eases 180% Bloom. Direct? Covers solo to 170%. 2pc Vourukasha for HP/ER, Whirling for off-field.