Gas Mask
⭐ RARE ITEMNote: Some guides still list “Lifesteal” — community testing and recent descriptions point to Overheal.
Looking for more items? Explore the full Megabonk Items index to plan your poison builds.
🔓 How to Unlock Gas Mask
Requirement: Kill 5,000 enemies while playing as Amog. Progress persists across runs.
Verification: This unlock condition is consistently reported across multiple independent sources and community compendiums as of Oct 2025.
🧪 Mechanics & Notes
- Dynamic scaling: Armor/Overheal increase with the number of poisoned enemies around you and can fluctuate mid-fight.
- UI caveat: The bonus typically isn't shown on the character stat sheet; observe survivability changes in combat.
- Terminology: Some guides still say “Lifesteal”. Testing and modern descriptions favor Overheal (excess healing stored as a temporary buffer).
Tip: Don’t chase exact numbers — focus on keeping many enemies poisoned to maximize uptime.
🔗 Best Synergies
Core Poison Enablers
Moldy Cheese
Significantly raises poison application rate, helping Gas Mask maintain high stacks.
Poison Flask (Weapon)
Dedicated poison weapon to continuously seed status across mobs.
Toxic Barrel
Spreads poison on taking damage or via contact, reinforcing area-wide poison coverage.
Survivability Pairings
Chonkplate
Another source of Overheal via excess healing, stacking well with Gas Mask’s buffer playstyle.
📋 Patch Status
As of v1.0.12 (October 8, 2025), official patch notes do not explicitly mention changes to Gas Mask. Broader meta shifts (e.g., Final Swarm rework) do not alter this item’s core behavior described above.