Lucia is an Ether Support built to supercharge squad damage while padding survivability. Her kit revolves around entering Ether Veil, handing out teamwide Sheer Force DMG buffs, and boosting Max HP. She slips cleanly into Rupture-centric teams — think Yixuan or Manato cores — and rewards simple discipline: trigger her EX/Ultimate to start the damage window, then rotate to your carries while her background Aftershocks keep pressure up.

Best Lucia W‑Engines (signature to budget)

W‑Engine What it does for Lucia Notes
Dreamlit Hearth (S) Ideal fit. Activating or extending Ether Veil grants the team increased DMG and Max HP; substat HP% lines up with her scaling. Her signature; the most complete mix of uptime, team damage, and HP padding.
Elegant Vanity (S) Teamwide DMG buff after Energy spend; trickles Energy back to Lucia for more frequent EX windows. Simple, reliable, and rotation‑friendly.
Weeping Cradle (S) Short, repeating team DMG buff on hit. Lines up with Lucia’s periodic Aftershock triggers (roughly every 8s), though there’s notable downtime.
Unfettered Game Ball (A) Raises team CRIT Rate when you trigger an Attribute Counter on Ether‑weak enemies. Great only when targets are weak to Ether.
Kaboom the Cannon (A) Stacks team ATK% while anyone is landing hits. Practical free‑to‑play option; if unavailable, The Vault is a workable fallback.

Pick for your comfort: Dreamlit Hearth if you have it, Elegant Vanity for a clean on‑rotation buff, Weeping Cradle for bursty but shorter windows, or a straightforward A‑rank pick if you’re building on a budget.

Best Lucia Drive Discs

Set Why it fits
4‑pc Moonlight Lullaby As a Support, using EX Special or Ultimate grants a team DMG buff that lasts 25s. This cleanly matches her rotation and lets you refresh the window on return.
2‑pc Yunkui Tales +10% HP shores up her HP‑based scaling and strengthens her key buffs.

Stay disciplined: open with EX/Ultimate to turn on Moonlight Lullaby, then swap to your DPS while Lucia sustains value off‑field.

Drive Disc main stats and sub‑stats

Drive Disc slot Main stat Why
Slot 4 HP% Directly fuels her HP‑tied buffs and damage conversions.
Slot 5 HP% Same logic — bigger Max HP, better team value.
Slot 6 HP% or Energy Regen HP% if you’re shy of a healthy total; Energy Regen if you want faster EX/Ultimate uptime.
Sub‑stat priority Target
HP% High
Flat HP High

As a baseline, aim for a robust HP pool first — roughly in the mid‑20k range is a practical benchmark — then add Energy Regen only as needed to keep EX and Ultimate ready on rotation.

Mindscape Cinema priorities

Tier Name Effect (condensed) Priority
M1 Secret Friend Additional DMG from Dreamer’s Nursery Rhyme ignores 18% All‑Attribute RES; +5% Decibel gain. Skill upgrades grant Echo stacks (up to 4); on end, consumes a stack to reapply Nursery Rhyme to the squad. Priority
M2 Great Magician Inside Ether Veil: Wellspring, Harmony deals +15% DMG; Darkbreaker state allies gain +15% Sheer DMG. High
M4 Late‑Night Hours On Ether Veil activation/extension, grant all squad members 100 Decibels (15s cooldown). Medium
M6 The Never‑Ending Journey Inside any Ether Veil, Lucia gains ATK equal to 2% of initial Max HP; Harmony always Crits and gains +30% Crit DMG. High

These upgrades lean into what she already does well: extend buff windows, raise team damage, and make Harmony hits more meaningful during Veil uptime.

Team fit and play pattern

  • Core idea: open with Lucia’s EX Special or Ultimate to trigger Moonlight Lullaby’s team DMG window and Ether Veil, then swap to your DPS.
  • Background value: while off‑field, her Aftershock triggers on a fixed cadence, keeping team damage rolling between swaps.
  • Who she likes: Rupture‑leaning squads with Yixuan or Manato. She also pairs well with sub‑DPS who benefit from long, predictable buff windows.
  • Weapon nuance: Unfettered Game Ball shines only when enemies are weak to Ether; Weeping Cradle’s short buff cycles line up best when you’re consistently proccing Aftershocks.

Lucia materials (promotion, skills, boss drops)

What you’ll farm:

  • Support promotion seals: Basic, Advanced, and Ruler Certification Seals
  • Ether Chips for skill upgrades (Basic, Advanced, Specialized)
  • Higher Dimensional Data: Corrupted Dreamsteel (normal boss)
  • Crimson Miasma Spike (Wandering Hunter weekly boss)

Promotion costs

Max level Dennies Materials
20 24,000 Basic Support Certification Seal ×4
30 56,000 Advanced Support Certification Seal ×12
40 120,000 Advanced Support Certification Seal ×20
50 200,000 Ruler Certification Seal ×10
60 400,000 Ruler Certification Seal ×20
Total 800,000 Basic ×4, Advanced ×32, Ruler ×30

Skill enhancement (Ether Chips)

Skill level Dennies Materials
2 2,000 Basic Ether Chip ×2
3 3,000 Basic Ether Chip ×3
4 6,000 Advanced Ether Chip ×2
5 9,000 Advanced Ether Chip ×3
6 12,000 Advanced Ether Chip ×4
7 18,000 Advanced Ether Chip ×6
8 45,000 Specialized Ether Chip ×5
9 67,500 Specialized Ether Chip ×8
10 90,000 Specialized Ether Chip ×10
11 112,500 Specialized Ether Chip ×12

Higher levels continue the same pattern with increasing Dennies and Specialized Ether Chips.

The build is straightforward: stack HP, keep Ether Veil and Moonlight Lullaby active, and let teammates cash in on long buff windows while Lucia sustains pressure off‑field. If you have Dreamlit Hearth, use it. If not, pick a W‑Engine that either accelerates her Energy flow or adds a simple, reliable team buff, and keep your rotation tight.