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Mephitis

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Mephitis is a boss. 100.

Development source reviewed on 29 October 2026. In-game availability is unverified.

At a glance#

PropertyValue
ClassificationBoss
Difficulty100
AIAI_Melee
TamingNot marked tameable
Minimum taming skillNot specified
Control slotsNot specified

Attributes and damage#

AttributeValue or rangeInterpretation
Str505–1000Source range
Dex102–300Source range
Int402–600Source range
Hits3000Source range
Stam105–600Source range
Damage21–33Source range

Resistances#

AttributeValue or rangeInterpretation
Physical75–80Source range
Fire60–70Source range
Cold60–70Source range
Poison100Source range
Energy60–70Source range

Damage types#

AttributeValue or rangeInterpretation
Physical50Source range
Poison50Source range

Skills#

AttributeValue or rangeInterpretation
Magic Resist70.7–140Source range
Tactics97.6–100Source range
Wrestling97.6–100Source range

Loot eligibility#

Ordinary treasure is conditional on encounter eligibility

One shared difficulty gold/equipment budget can apply when the requested treasure theme is reached and all runtime eligibility checks pass. Conditions on the source loot calls still apply.

Requested gem, potion and scroll supplements use their separate theme/AI/body checks and one shared optional-supplement roll.

This evaluates definite source exclusions and requested themes. It does not inspect live ownership, summoned status, corpse contents or world spawns.

  • Creature is not deleted or a player.
  • Creature is not summoned, controlled or bonded.
  • Creature has no recorded owners.
  • NoKillAwards, IsInvulnerable and Blessed must all be false at generation time.
  • Ordinary loot is generated only once; existing generated gold and ordinary equipment consume that budget.

Difficulty-based loot budget#

For eligible wild creatures that request treasure, the difficulty system replaces ordinary gold and equipment rolls with one budget. A difficulty estimate crossing a tier boundary shows every possible tier. The eligibility and source-call conditions above still apply.

DifficultyGold budgetGuaranteed equipmentExtra item chancePropertiesIntensity
D1001,800–2,800275%575–100

Loot and special drops#

Source calls describe requested themes, conditions and inventory. Ordinary equipment/gold are reconciled through DifficultyLoot; these calls are not additive guaranteed payouts. Runtime dispatch and conditional special rewards still apply.

Drop rules#

Loot requestInterpretationCondition
4 × Ultra Rich loot themeRequests ordinary treasure within one shared difficulty budget; repeated pack requests do not multiply the payout.No condition in extracted rule

Scripted drops and item transfers#

These operations occur in the named methods. They can describe encounter rewards, service transactions or other item transfers; they are not an unconditional corpse-drop list.

OperationMethodInterpretation and conditions
CreateArtifact(UniqueList)GetArtifactInvokes a dedicated artifact or scroll reward handler under its own eligibility rules.
CreateArtifact(SharedList)GetArtifactInvokes a dedicated artifact or scroll reward handler under its own eligibility rules.
CreateArtifact(DecorativeList)GetArtifactInvokes a dedicated artifact or scroll reward handler under its own eligibility rules.
m.Corpse.DropItem(ps)GivePowerScrollToPlaces a scripted item into a container. Read the source conditions and method context. else if (m.Corpse?.Deleted == false)
prot.Corpse.DropItem(powerScroll)GivePowerScrollToPlaces a scripted item into a container. Read the source conditions and method context. if (chance > 0 && chance > Utility.Random(100)) else if (prot.Corpse?.Deleted == false)
GivePowerScrolls()OnBeforeDeathInvokes a dedicated artifact or scroll reward handler under its own eligibility rules. if (!NoKillAwards)
c.DropItem(new ChampionSkull(SkullType))OnDeathPlaces a scripted item into a container: Champion Skull. Read the source conditions and method context. if (Map == Map.Felucca) else

Unique List candidate items#

Candidate items in Mephitis.UniqueList. Selection and award eligibility are separate from ordinary creature loot.

Defined on this creature

Chance per call to BaseChampion.GetArtifact, not an unconditional per-kill drop chance. An empty selected list returns no item. Nonempty lists select an array entry uniformly; repeated entries retain their multiplicity.

ItemSelection weight or occurrences
Calm1

Shared List candidate items#

Candidate items in Mephitis.SharedList. Selection and award eligibility are separate from ordinary creature loot.

Defined on this creature

Chance per call to BaseChampion.GetArtifact, not an unconditional per-kill drop chance. An empty selected list returns no item. Nonempty lists select an array entry uniformly; repeated entries retain their multiplicity.

ItemSelection weight or occurrences
Oblivions Needle1
A Necromancer Shroud1
Embroidered Oak Leaf Cloak1
The Most Knowledge Person1

Decorative List candidate items#

Candidate items in Mephitis.DecorativeList. Selection and award eligibility are separate from ordinary creature loot.

Defined on this creature

Chance per call to BaseChampion.GetArtifact, not an unconditional per-kill drop chance. An empty selected list returns no item. Nonempty lists select an array entry uniformly; repeated entries retain their multiplicity.

ItemSelection weight or occurrences
Web1
Monster Statuette1

Taming, resources and other properties#

PropertyValue
Hit PoisonPoison.Lethal
Poison ImmunePoison.Lethal
Fame22500
Karma-22500
Virtual Armor80
Can Move Over Obstaclestrue
Can Destroy Obstaclestrue
Body173
Base Sound ID0x183
Unique Listnew[] { typeof(Calm) }
Shared Listnew[] { typeof(OblivionsNeedle), typeof(ANecromancerShroud), typeof(EmbroideredOakLeafCloak), typeof(TheMostKnowledgePerson) }
Decorative Listnew[] { typeof(Web), typeof(MonsterStatuette) }
Skull TypeChampionSkullType.Venom

Matching slayers#

  • Arachnid Slayer (Super slayer)
  • Spider Slayer (Lesser slayer)

Notes#

  • Source type availability does not establish a live spawn, location or current world count.

Related references#

Source notes

Show 45 references

These references identify the reviewed shard files. Source presence does not establish live availability.

  1. Projects/UOContent/Mobiles/Special/Mephitis.cs:8
    Type declaration
  2. Projects/UOContent/Mobiles/Difficulty/NpcDifficulty.cs:25
  3. Projects/UOContent/Mobiles/Difficulty/DifficultyLoot.cs:29
  4. Projects/UOContent/Mobiles/Difficulty/DifficultyLoot.cs:37
  5. Projects/UOContent/Mobiles/Difficulty/DifficultyLoot.cs:314
  6. Projects/UOContent/Mobiles/Special/Mephitis.cs:47
  7. Projects/UOContent/Mobiles/Special/BaseChampion.cs:29
  8. Projects/UOContent/Mobiles/Special/Mephitis.cs:49
  9. Projects/UOContent/Mobiles/Special/Mephitis.cs:55
  10. Projects/UOContent/Items/Weapons/SlayerGroup.cs:286
    Super slayer membership
  11. Projects/UOContent/Items/Weapons/SlayerGroup.cs:302
    Lesser slayer membership
  12. Projects/UOContent/Mobiles/Special/Mephitis.cs:17
  13. Projects/UOContent/Mobiles/Special/Mephitis.cs:18
  14. Projects/UOContent/Mobiles/Special/Mephitis.cs:19
  15. Projects/UOContent/Mobiles/Special/Mephitis.cs:21
  16. Projects/UOContent/Mobiles/Special/Mephitis.cs:22
  17. Projects/UOContent/Mobiles/Special/Mephitis.cs:24
  18. Projects/UOContent/Mobiles/Special/Mephitis.cs:26
  19. Projects/UOContent/Mobiles/Special/Mephitis.cs:27
  20. Projects/UOContent/Mobiles/Special/Mephitis.cs:29
  21. Projects/UOContent/Mobiles/Special/Mephitis.cs:30
  22. Projects/UOContent/Mobiles/Special/Mephitis.cs:31
  23. Projects/UOContent/Mobiles/Special/Mephitis.cs:32
  24. Projects/UOContent/Mobiles/Special/Mephitis.cs:33
  25. Projects/UOContent/Mobiles/Special/Mephitis.cs:35
  26. Projects/UOContent/Mobiles/Special/Mephitis.cs:36
  27. Projects/UOContent/Mobiles/Special/Mephitis.cs:37
  28. Projects/UOContent/Mobiles/Special/Mephitis.cs:66
  29. Projects/UOContent/Mobiles/Special/BaseChampion.cs:32
  30. Projects/UOContent/Mobiles/Special/BaseChampion.cs:33
  31. Projects/UOContent/Mobiles/Special/BaseChampion.cs:34
  32. Projects/UOContent/Mobiles/Special/BaseChampion.cs:153
  33. Projects/UOContent/Mobiles/Special/BaseChampion.cs:194
  34. Projects/UOContent/Mobiles/Special/BaseChampion.cs:207
  35. Projects/UOContent/Mobiles/Special/BaseChampion.cs:260
  36. Projects/UOContent/Mobiles/Special/Mephitis.cs:62
  37. Projects/UOContent/Mobiles/Special/Mephitis.cs:61
  38. Projects/UOContent/Mobiles/Special/Mephitis.cs:39
  39. Projects/UOContent/Mobiles/Special/Mephitis.cs:40
  40. Projects/UOContent/Mobiles/Special/Mephitis.cs:42
  41. Projects/UOContent/Mobiles/Special/BaseChampion.cs:17
  42. Projects/UOContent/Mobiles/Special/BaseChampion.cs:18
  43. Projects/UOContent/Mobiles/Special/Mephitis.cs:14
  44. Projects/UOContent/Mobiles/Special/Mephitis.cs:15
  45. Projects/UOContent/Mobiles/Special/Mephitis.cs:45

Category: Monsters and NPCs