Build it for the free, ammo-less lock-on alt-fire that locks up to 5 targets through cover and fires homing missiles. It has the slowest reload of any secondary and the slowest fire rate of any burst-fire sidearm, so it drags without mods to prop it up.
Kills with the primary fire’s explosive twin-round burst charge a meter. Full meter switches Alternate Fire to lock-on mode: tag up to 5 enemies within 80m, then fire a zero-ammo homing missile volley that drains the whole meter no matter how many targets you locked.
Sepulcrum is the Entrati’s double-barreled explosive hand cannon from Heart of Deimos, and it still matters in 2026 because its 30% crit chance is the highest of any burst-fire sidearm and its lock-on missile alt-fire clears groups for free.
How to get the Sepulcrum
- Complete the Heart of Deimos quest to unlock the Cambion Drift open world and meet the Entrati.
- Rank up Entrati syndicate standing to Rank 2, Acquaintance.
- Buy the Sepulcrum main blueprint from Father for 4,000 standing.
- Buy the three component blueprints from Father, 2,000 standing each, for 8,000 standing total.
- Gather the crafting resources each blueprint calls for; check Father’s offerings or the wiki page for the current resource list, since this can shift between updates.
- Build all four blueprints in the Foundry, then wait out or rush the final build timer.
As a syndicate weapon, Sepulcrum is not player-tradeable; a second copy means buying the blueprint set again with standing and platinum rather than trading for one.
Stats
| Class | Secondary |
|---|---|
| Mastery Rank | 14 |
| Trigger | BURST |
| Noise | Alarming |
| Fire Rate | 3.67 |
| Accuracy | 22.2 |
| Magazine | 90 |
| Reload | 4 s |
| Critical Chance | 30% |
| Critical Multiplier | 2.2x |
| Status Chance | 14% |
| Riven Disposition | (1.1) |
| Damage | 94 total |
|---|---|
| Impact | 9.6 |
| Puncture | 26.9 |
| Slash | 11.5 |
| Heat | 46 |
Riven disposition is 1.10, a middling number driven by low usage, so a riven is only worth it if you already like the explosive-burst playstyle and want to patch in multishot or crit damage, not to chase meta status.
Builds
This is a crit-heavy Viral build for Sepulcrum, pairing Frostbite and Pathogen Rounds for Cold plus Toxin while Hornet Strike, Barrel Diffusion, and Primed Pistol Gambit pump raw damage and multishot. Primed Target Cracker, Hollow Point, and Galvanized Crosshairs then stack crit chance and crit damage on top of Sepulcrum’s strong 28% base crit to turn every hit into a big orange crit.
14Hornet Strike
Pistol
11Barrel Diffusion
Pistol
12Primed Pistol Gambit
Pistol
14Primed Target CrackerPistol
9Hollow Point
Pistol
12Galvanized CrosshairsPistol
7FrostbitePistol
11Pathogen RoundsPistol| Mod | Why it’s here |
|---|---|
| Hornet Strike | Boosts Sepulcrum’s base damage on both its primary fire and its seeking missile alt fire. |
| Barrel Diffusion | Adds multishot so more pellets roll for crit and status on every hit. |
| Primed Pistol Gambit | Adds a big chunk of crit chance, pushing the 28% base toward consistent orange crits. |
| Primed Target Cracker | Pushes Sepulcrum’s already strong 28% base crit chance well past the point of consistent orange crits. |
| Hollow Point | Boosts crit damage so Sepulcrum’s frequent crits hit much harder. |
| Galvanized Crosshairs | Adds more crit chance and stacks bonus crit damage on crit kills, rewarding a crit-heavy weapon like this one. |
| Frostbite | Supplies the Cold half of a Viral combo to strip effective health from armored or shielded targets. |
| Pathogen Rounds | Supplies Toxin damage and extra status chance, completing Viral and helping Sepulcrum’s modest 20% base status land the proc reliably. |
Secondary Merciless is the top pick since the high crit chance and above-average multiplier make its stacking crit damage worth it, with Secondary Deadhead as a cheaper, easier-to-farm alternative that boosts headshot damage without needing a crit chain.
Reviewed September 2026.
Pros and Cons
Pros
- Highest crit chance of any burst-fire sidearm at 30%
- Free, ammo-less missile alt-fire that locks up to 5 targets through cover
- 1.6 meter explosive splash on primary fire clears groups without AoE mods
- Largest magazine of any burst-fire sidearm for sustained fights
- Above-average crit multiplier plus real status chance gives genuine hybrid flexibility
Cons
- Slowest reload speed of any secondary weapon in the game
- Slowest fire rate among all burst-fire sidearms
- No Incarnon Genesis, so its damage ceiling sits below Incarnon secondaries
- Alt-fire needs several kills to charge first, so it’s dead weight opening on a single tough target
Sepulcrum is for players who already like explosive splash-damage secondaries and want a lock-on missile panic button, not for anyone chasing top-of-chart DPS.