Mycopunk Decay: and Part Loss

Decay is Mycopunk's damage-amplifier element. A decayed target takes 20% more damage from every source, and a decayed body part below 10% health falls off the enemy. No other element removes parts, which makes decay the only status that changes an enemy's silhouette.

Decay tuning

The 4-second lifetime is the longest of the three damage elements (Fire, Shock and Acid run 3 s), and it is the reason decay is worth applying even on enemies that die quickly: the window covers a full magazine.

How part loss works

Every enemy is built from parts: shell, arms, legs, cores. When a part is decayed and its health drops below 10% of its maximum, the part detaches. The enemy keeps fighting with whatever is left.

The practical effects:

• An armless enemy loses the weapon attached to that arm
• A legless enemy can no longer chase, which turns a chaser into a turret
• A de-cored enemy loses the drop attached to that core

Decay is therefore the only element that converts damage into permanent crowd control. A Brute Sniper with its arm removed is no longer a threat regardless of how much shell health it has left.

Applying decay

Decay comes from weapons and upgrades rather than enemy attacks, and it is the element most often attached to utility nodes:

• Decay application nodes exist across the primary pools, usually on Rare and Epic tiers
• Eye of the Storm (Mycologist) applies decay based on infection level
• Decay is the element most commonly converted to with Cosmic Microwave (Contraband)

The element does not appear on any default weapon, which is why decay builds are built rather than found.

Decay versus Rot

Both are amplifiers, and the difference is duration:

Rot is the better boss element because it lasts a minute; decay is the better room element because it disarms everything in front of you.

Decay on the player

Enemies apply decay too, and the status stops your regeneration while active. It does not remove your parts, but the +20% damage taken means a decayed player dies noticeably faster in the same wave.

FAQ

What does decay do in Mycopunk?

It increases damage taken by 20% for 4 seconds and causes decayed body parts below 10% health to detach from the enemy.

Does decay stack?

The status does not stack with itself, but it stacks with other elements: a decayed target also taking Fire damage gets both effects.

Is decay good against bosses?

It is the best part-removal tool against multi-armed bosses, but its 4-second window means you need to reapply constantly. Rot lasts far longer on a boss.

If you are planning what to open next, the upgrade grids explained page covers node shapes and rarity, while the threat levels page shows what the harder tiers actually pay.

Sources

Threat, mission, element and resource values were read from the Mycopunk 1.0 build and cross-checked against the official patch notes and the Steam store page. Where a rule is only described in player-written notes, the Steam guide index is the second source.