Mythic Storm King Damage Bug: What to Know in Save the World
The Mythic Storm King damage bug is a current Save the World issue that Epic is still investigating in v42.10. Epic’s known-issues notes specifically say weapon damage output can be inconsistent, particularly during Mythic Storm King fights.
That matters because an unusually weak crystal, horn or final-damage attempt is not automatically proof that your perks, Power Level or Hero loadout changed. You should still check the normal setup, but there is currently an acknowledged game-side variable that can affect how the fight feels.
What the Mythic Storm King damage bug means
Mythic Storm King damage bug Image Epic Games.
- Check Epic’s current known-issues page before rebuilding your loadout.
- Verify your weapon is correctly evolved, perked and repaired.
- Confirm your Hero loadout and support perks are still equipped.
- Test the weapon in another mission if possible.
- If damage only feels wrong in MSK, treat the current known issue as a possible cause.
- Avoid spending scarce resources to “fix” a build until you have ruled out the bug.
What Epic has confirmed
Epic currently lists inconsistent weapon damage output as an issue under Save the World and calls out Mythic Storm King fights specifically. That is the key fact behind the Mythic Storm King damage bug.
Epic has not published a precise player-side formula for when the inconsistency appears, so do not invent a permanent workaround that the notes do not support.
Checks that are still worth doing
A known bug does not mean every low-damage run is the bug. Check weapon level, evolution path, perk rolls, durability, Hero Commander and support perks.
Also check that you are comparing the same phase. Crystal damage, horn damage and final boss damage are different jobs and can use different weapons.
Do not waste upgrade materials chasing the issue
If a previously working build suddenly feels wrong only in MSK, be cautious about spending Core RE-PERK, Superchargers or large amounts of PERK-UP just to compensate. The Mythic Storm King damage bug is under investigation, so the underlying behavior may change when Epic fixes it.
Keep a known-good copy of your build rather than redesigning everything around one bad run.
What to do during the fight
Even with the Mythic Storm King damage bug, the encounter priorities do not change. Kill Mini-Bosses to control the storm, do not mistime crystal five, build cleanly to horns and keep the squad alive for transitions.
Mechanical mistakes will still end the run regardless of damage consistency.
Quick answer
The Mythic Storm King damage bug is a current Epic-tracked issue involving inconsistent weapon damage output in MSK fights. Check your setup, but do not assume every weak run is your build.
Epic currently lists the issue in the v42.10 known issues and fixes.
Until Epic marks the Mythic Storm King damage bug as fixed, judge changes across several runs rather than one damage number. Keep the rest of the fight fundamentals consistent so you can tell a mechanic problem from a damage-output problem.
Before your next attempt
Before another run focused on Mythic Storm King damage bug, check the exact prerequisite, weapon role or fight transition described above instead of changing several things at once. Make sure the quest counter has updated in Homebase, repair and reload the weapons you actually need for this phase, carry enough materials for movement and horn access, and confirm the whole squad knows what happens immediately after the current objective is finished.
This matters because Mythic Storm King damage bug is usually lost at the transition rather than during ordinary Husk clearing. A team can have enough raw damage and still fail because crystal five was triggered with someone down, a Mini-Boss was left alive, the horn weapon was not ready, or the reward quest was never active. Fix the exact failure point, then repeat the attempt with the rest of the setup unchanged so you can tell whether the change worked.
