Mongil Codex · Slayer artifact · SSR
Suffocating Darkness
5-star SSR
Slayer- SSR
"Hold your breath. Not a sound if you want to live. A skilled master will notice everything." - 『Surviving an Assassin』
Main effect
Activates as soon as the artifact is equipped — no reinforcement required.
Blade of Shadows Ⅰ
When equipped by an Assassin character, grants the following effects. Crit DMG increases by 8% upon using a Support Skill or Switch Skill. (Max Stacks: 2, Duration: 15s, New stacks reset the duration).
Fusion bonuses
Bonus effects unlocked by reaching Fusion levels — applied on top of the artifact's main effect.
- Lv. 3
Gains a 0.06% ATK Boost for every 10 points of Assassin proficiency. (Max: 5%)
- Lv. 5
Gains a 0.06% ATK Boost for every 10 points of Assassin proficiency. (Max: 5%)
Overlap effects
Reinforce past these milestones to unlock additional effects on top of the main effect — the artifact keeps every overlap it has earned.
When equipped by an Assassin character, grants the following effects. Crit DMG increases by 8% upon using a Support Skill or Switch Skill. (Max Stacks: 2, Duration: 15s, New stacks reset the duration).
When equipped by an Assassin character, grants the following effects. Crit DMG increases by 11% upon using a Support Skill or Switch Skill. (Max Stacks: 2, Duration: 15s, New stacks reset the duration).
When equipped by an Assassin character, grants the following effects. Crit DMG increases by 12% upon using a Support Skill or Switch Skill. (Max Stacks: 2, Duration: 15s, New stacks reset the duration).
When equipped by an Assassin character, grants the following effects. Crit DMG increases by 13% upon using a Support Skill or Switch Skill. (Max Stacks: 2, Duration: 15s, New stacks reset the duration).
When equipped by an Assassin character, grants the following effects. Crit DMG increases by 16% upon using a Support Skill or Switch Skill. (Max Stacks: 2, Duration: 15s, New stacks reset the duration).
Stats
- ATK
Reinforcement
- Max level
- 60Lv.
- Total EXP
- 12,115,236EXP
- Total gold
- 120Gold
Comments
Guides
In-house guides re-tested every patch.
Guides and articles content remains in English.
Mongil: Star Dive — Beginner Guide
Adventure map, jumping, gathering and the first-week checklist — every core mechanic the in-game tutorial walks you through, written in one place.
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Reroll Guide — Best Targets and Stop Conditions
Best characters to chase on a fresh account, the fastest reroll path, and when the meta says you should stop and commit.
Best Team Comps — Destroyer, Slayer and Flex Slot
How team building actually works in Mongil — the Destroyer + Slayer + flex template the Stagger system rewards, when to break it for element-locked counters, and the Brawler-led sustained-DPS variant.
Combat Basics — Hold Attacks, Switch Skills, Ultimates
Basic attacks, special skills, switch skills and ultimate timing — the hold-input combat system explained without the in-game popup spam.
Frequently asked
- Who can equip Suffocating Darkness in Mongil: Star Dive?
- Suffocating Darkness is a Slayer artifact, so any Slayer character can equip it. The main effect activates whenever the artifact is equipped, regardless of reinforcement level.
- What does Suffocating Darkness's main effect do?
- Suffocating Darkness's main effect activates as soon as the artifact is equipped on a Slayer character — see the Main effect section above for the full breakdown. Overlap effects unlock as you reinforce the artifact past key milestones.
- How do I reinforce Suffocating Darkness?
- Feed Mana Cores at the reinforcement bench. Suffocating Darkness requires 12,115,236 total EXP to max out, with overlap effects unlocking at scheduled milestones.
- Is Suffocating Darkness worth pulling in the current patch?
- SSR artifacts like Suffocating Darkness carry the ceiling for Slayer damage and survivability. Compare its main effect against your roster's needs before spending pulls.
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