Sunday Build Guide 2026: Best Relics, Light Cones & Hypercarry Teams
Complete Sunday build guide for version 4.x. Covers Sacerdos relics, F2P light cone options, speed tuning, and the best hypercarry team compositions.
Overview
Sunday is a 5★ Imaginary Harmony character and the premier hypercarry support in Honkai: Star Rail. He provides 100% action advance (including for summons), CRIT rate and CRIT DMG buffs, energy restoration, and debuff cleansing.
He is widely considered a must-pull for any account that wants to maximize damage output.
Role: Support (Hypercarry Buffer) Rarity: 5★ Element: Imaginary Path: Harmony
F2P Verdict: ✅ One of the best value pulls in the game. Works at E0, has solid 4-star light cone options, and fits into almost any team.
How His Kit Works (Simple Explanation)
- Skill: Advances target ally by 100% (including their summon), removes debuffs, gives a 2-turn buff.
- Ultimate: Restores 20% of target's max energy (min 40) and buffs their CRIT DMG based on Sunday's own CRIT DMG.
- Talent: CRIT Rate boost for the ally he buffs (+20% at max trace).
- A6 Trace: Using Skill on an ally with a summon gives both Sunday and the summon extra energy.
Key takeaway: Stack CRIT DMG and Speed on Sunday. He scales well with both.
Best Relic Sets
4-Piece: Sacerdos' Relived Ordeal ★★★★★ (Best in Slot)
| Bonus | Effect |
|---|---|
| 2-Piece | SPD +6% |
| 4-Piece | Using Skill or Ultimate on an ally increases their CRIT DMG by 18% (stacks up to 2 times). |
This set is tailor-made for Sunday. The stacking CRIT DMG buff is massive for your carry.
Alternative: 4-Piece Messenger Traversing Hackerspace
- +6% SPD (2pc) + team-wide SPD boost on ultimate (4pc)
- Decent if you don't have Sacerdos yet, but noticeably worse
2-Piece + 2-Piece Options (Early Game)
- 2pc Sacerdos + 2pc Messenger / 2pc Longevous (SPD/HP)
- Use this as transition while farming Sacerdos
Planar Ornaments
| Set | Verdict |
|---|---|
| Lushaka, the Sunken Seas ★★★★★ | Best in slot. +5% Energy Regen. Boosts first-slot ally's ATK by 12%. |
| Broken Keel ✅ F2P | +10% CRIT DMG to whole team if Effect RES ≥ 30%. Easy to activate. |
| Sprightly Vonwacq | +5% Energy Regen. Advanced action at start. Situational for 0-cycle clears. |
Main Stats & Substats
Stat Priority
| Piece | Main Stat | Priority |
|---|---|---|
| Body | CRIT DMG% | ★★★★★ |
| Feet | SPD | ★★★★★ |
| Planar Sphere | HP% / DEF% | ★★★ |
| Link Rope | Energy Regeneration Rate | ★★★★★ |
If you have over 200% CRIT DMG from substats, you can switch body to HP% for survivability — but CRIT DMG body is the standard.
Substats Priority
- CRIT DMG (target 180%+ — this directly buffs your carry)
- SPD (target 134 for general use, or tuned to your DPS)
- Effect RES (30% to activate Broken Keel)
- HP% / DEF% (survivability)
Stat Breakpoints
| Stat | Target | Notes |
|---|---|---|
| CRIT DMG | 180%+ (200%+ endgame) | Directly converts to your carry's buff |
| SPD | 134 (general) or tuned to DPS | See speed tuning section below |
| Effect RES | 30%+ (for Broken Keel) | Base 18% + 2 substat rolls |
| Energy Regen | 119.4%+ (with ERR rope) | 3-turn ultimate rotation |
Speed Tuning Guide
Speed tuning is the most important part of building Sunday. Your goal depends on your team:
| Setup | Speed Target | How To |
|---|---|---|
| DPS → Sunday → DPS loop | Sunday 1 SPD slower than your carry | -1 SPD setup. Carry goes first, Sunday advances them again. |
| Hyperspeed Sunday | 160+ SPD | Sunday goes multiple times before your slow DPS. More energy for carry. |
| Base speed Sunday | 134 (standard breakpoint) | Good for general use with most teams. |
Most common setup: Sunday at 134 SPD, DPS at 135 SPD. This lets your DPS act, Sunday advances them, they act again — two turns in one cycle.
Best Light Cones
Premium Options
| Light Cone | Rarity | Note |
|---|---|---|
| A Grounded Ascent | 5★ | Signature. Energy regen, DMG buff, SP generation. Best in slot. |
| But the Battle Isn't Over | 5★ | Bronya's LC. Energy regen, SP recovery, 30% DMG boost on ultimate. Solid backup. |
F2P Options ✅
| Light Cone | Source | Verdict |
|---|---|---|
| Past and Future (S5) 🏆 | Forgotten Hall | Best F2P option. 32% DMG boost on Skill. Since Sunday always uses Skill, this is free uptime. |
| Carve the Moon, Weave the Clouds | Battle Pass (free) | Random ATK/CRIT/Energy buff on ally. Decent and free. |
| Dance! Dance! Dance! | Gacha (4★) | Team-wide action advance on Ultimate. Great for speed teams. |
| Memories of the Past | Gacha (4★) | Energy on attack. Decent early option. |
| Meshing Cogs | 3★ | Energy on hit. Budget option, surprisingly effective for ultimate uptime. |
Tip: Past and Future at S5 is genuinely excellent on Sunday. Don't feel pressured to pull his signature LC unless you have extra pulls.
Trace Priority
| Trace | Priority | Why |
|---|---|---|
| Skill | ★★★★★ | Main buff + action advance |
| Ultimate | ★★★★★ | Energy restore + CRIT DMG buff |
| Talent | ★★★★★ | CRIT Rate buff for carry |
| Basic ATK | ★★☆☆☆ | Almost never used |
Best Team Compositions
Sunday fits into any team with a hypercarry. Here are the best setups:
Summon Team (S-Tier)
| Role | Character | Notes |
|---|---|---|
| DPS | Phainon / Castorice / Jing Yuan | Carries with strong summons |
| Support | Sunday | 100% advance also works on their summon |
| Sub-DPS | Robin / Ruan Mei | Additional damage amp |
| Sustain | Huohuo / Aventurine | Energy or shield synergy |
General Hypercarry Team
| Role | Character |
|---|---|
| DPS | Any hypercarry (Feixiao, Acheron, Dan Heng IL, etc.) |
| Support | Sunday |
| Sub-DPS | Tingyun / Pela / Robin |
| Sustain | Any healer or shielder |
F2P Team ✅
| Role | Character | How to Get |
|---|---|---|
| DPS | Any DPS you own (even 4★) | Your choice |
| Support | Sunday | Limited banner |
| Support | Tingyun / Pela | ✅ Free |
| Sustain | Gallagher / Lynx | ✅ Free |
Eidolons Worth
| Eidolon | Worth It? | Note |
|---|---|---|
| E0 | ✅✅ Must-have | Already a complete support at E0 |
| E1 | ✅ Nice | +40% DMG for the buffed ally |
| E2 | ✅ Nice | +20% SPD for carry after using skill |
| E6 | ❌ Not for F2P | Overkill for all content |
Recommendation: E0 is all you need. E1-E2 are nice quality of life. E6 is whale territory.
Game Mode Performance
| Mode | Rating | Notes |
|---|---|---|
| Memory of Chaos (MoC) | ★★★★★ | S-tier. Action advance is invaluable. |
| Pure Fiction (PF) | ★★★★ | A-tier. Less impactful in AoE content, but still strong. |
| Apocalyptic Shadow (AS) | ★★★★★ | S-tier. Hypercarry teams dominate here. |
F2P Quick Build Summary
Relic Set: 4-pc Sacerdos' Relived Ordeal
Planar Set: Broken Keel
Light Cone: Past and Future (S5, Forgotten Hall)
Main Stats: CRIT DMG% / SPD / HP% / ERR%
Substats: CRIT DMG > SPD > Effect RES (to 30%)
SPD Tuning: 134 (or 1 SPD less than your DPS)
Team: Sunday + Hypercarry + Flex Support + Sustain
Final Verdict
Should you pull Sunday as a F2P / light spender?
Absolutely yes. Sunday is the single best support you can add to almost any account. He:
- Works at E0
- Has excellent F2P light cone options (Past and Future S5)
- Fits into virtually any hypercarry team
- Gets even better with summon characters (the current meta)
- Is future-proof — action advance supports never go out of style
Rating: 10/10 — pull recommendation: ✅ Must Pull