Imaginary Hunt March 7th, a powerful 4-Star damage dealer gifted to players in Honkai: Star Rail, has become a staple for many trailblazers. With her versatility to excel in both traditional CRIT-focused builds and the modern hybrid Break build, choosing the right Light Cone for her is crucial. The Light Cone landscape has seen some shifts since her debut, and understanding the best tools for her kit is key to unlocking her full potential. This guide will break down her top Light Cone options, from the most accessible free-to-play choices to the premium 5-Star powerhouses, helping you decide which one is the perfect fit for your March 7th's playstyle.

The Foundation: Free-to-Play & 4-Star Options

For players starting their journey or saving resources, there are several excellent and accessible Light Cones that can turn March into a formidable force.

• Cruising in the Stellar Sea (Herta's Shop): Let's cut to the chase—this is the undisputed king of F2P options. At Superimposition 5, it's no joke, performing scarily close to limited 5-Star Light Cones. It grants a massive 32% CRIT Rate and a conditional 40% ATK boost. It's a fantastic all-rounder that works for both her CRIT and hybrid builds. Just keep an eye on maintaining the ATK buff, but honestly, it's usually a breeze.

  

• Swordplay (Gacha): This 4-Star gem is a monster at high Superimposition levels. When March hones in on a single target, the damage stacks up... literally. Its effect is simple to maintain, especially since her Enhanced Basic ATK after her Ultimate guarantees multiple hits, instantly maxing out the stacks. It's perfect for boss fights where you can let another teammate handle the adds. The damage? Let's just say it punches way above its weight class.

  

• Only Silence Remains (Gacha): A solid, no-frills choice for the CRIT build, but it comes with a catch. At S5, its CRIT Rate boost is fantastic... as long as you're fighting two or fewer enemies. Given how many bosses love to summon minions, maintaining this condition can be a bit of a headache. If you can manage the battlefield and keep the uptime, it's a great budget option. Otherwise... maybe look elsewhere.

  

• River Flows in Spring (Lucent Afterglow): This free 4-Star option is... okay. It's decent for the hybrid Break build thanks to its SPD and DMG bonuses, but the buff vanishing when March takes damage is a huge downside. You'll need to babysit her with shields, which isn't always ideal. There are simply better, more consistent choices out there. Consider it a temporary placeholder until you get something stronger.

  

The Premium Power: 5-Star Light Cones

For those seeking to maximize March's damage ceiling, the limited 5-Star Light Cones offer unparalleled power and unique synergies.

Light Cone	Best For	Key Strengths
In the Night	CRIT Build (BiS) / Hybrid Build	Massive CRIT stats, scales with SPD, enhances all her kit.
Baptism of Pure Thought	CRIT / Debuff Teams	Unconditional CRIT DMG, huge buffs after Ultimate, DEF ignore.
Worrisome, Blissful	CRIT / Follow-Up Teams	CRIT Rate, team-wide CRIT DMG buff, synergizes with Tame debuff.
Sailing Towards a Second Life	Hybrid Break Build (BiS)	Huge Break Effect boost, DEF ignore on Break DMG, SPD increase.

• In the Night (Seele's Signature): This is the top-tier choice for the CRIT build. Its synergy with SPD is just perfect for March. With her base 102 SPD, a SPD boot, and her first Eidolon, she can easily hit the thresholds for its powerful stacks, granting her bonus DMG on her Skill/Basic and CRIT DMG on her Ultimate. It's also incredibly potent for a hybrid Break build that aims for high in-battle SPD.

  

• Baptism of Pure Thought: An absolutely amazing and versatile option. It gives a chunk of CRIT DMG right off the bat, and using her Ultimate triggers a massive 32% DMG increase and 24% DEF ignore for her follow-up attacks—which perfectly buffs her multi-hit Enhanced Basic ATK. Oh, and it also rewards you for running debuffers, giving even more CRIT DMG based on the number of debuffs on the enemy. Talk about flexible!

  

• Worrisome, Blissful (Topaz's Signature): A fantastic team player. Not only does it boost March's own CRIT Rate and follow-up attack damage, but it also provides a team-wide CRIT DMG buff when attacking a target with the Tame debuff. This makes it pair exceptionally well with the Pioneer Diver of Dead Waters relic set. It turns March into a damage-dealing support hybrid.

  

• Sailing Towards a Second Life (Boothill's Signature): If you're building the hybrid Break Effect March, stop your search—this is the one. It is tailor-made for this playstyle. The massive 60% Break Effect boost is a game-changer, helping you hit the crucial 250% Break Effect threshold for the Iron Cavalry relic set with much less stress on your relic substats. Add in DEF ignore on Break DMG and a SPD increase, and you have the ultimate Break tool. For pure CRIT builds, you can safely skip this one.

  

Final Thoughts & Recommendations

Choosing March's Light Cone ultimately depends on your build path and what you have available.

• For New / F2P Players: Head straight to Herta's Shop and grab Cruising in the Stellar Sea. Max it out (S5). It will serve you incredibly well for a very, very long time.

• For the CRIT Build Path:

  • Best: In the Night > Baptism of Pure Thought > Worrisome, Blissful

  • Great Alternative: Cruising in the Stellar Sea (S5) or a high-superimposition Swordplay.

• For the Hybrid Break Build Path:

  • Best: Sailing Towards a Second Life is non-negotiable for optimization.

  • Strong Alternatives: In the Night (for high-speed builds), Baptism of Pure Thought, or Cruising in the Stellar Sea.

No matter which path you choose, Imaginary March 7th has a wealth of powerful Light Cones at her disposal. From the humble free options to the glittering signatures, there's a perfect weapon waiting to make her shine on the battlefield of the Simulated Universe and beyond. The rest, as they say, is up to your relics and team synergy.