Gem of the Skulking Assassin

Jewelry Jewel

Item Details

Utility 80.67
Bonus Level 39
Dyeable No
Sellable Yes
Tradeable Yes

Restrictions

Level Required 50
Usable By
All Classes

Magical Bonuses

Basic
Dexterity 22
Stealth 4
Envenom 4
Critical Strike 4
ToA
ToA Overcap - Dexterity 3

Primary Ability

Haste Level 50
Charge (30 max)


Raw Item JSON

{
  "sell_value" : 37718,
  "requirements" : {
    "level_required" : 50
  },
  "bonus_level" : 39,
  "sources" : {
    "monsters" : {
      "normal_drop" : [ "Borimo" ]
    }
  },
  "flags" : {
    "dyable" : false,
    "emblemizable" : false
  },
  "icon" : 114,
  "utility" : 80.66666666666667,
  "delve_text" : " \nMagical Bonuses:\n- Critical Strike: 4 pts\n- Stealth: 4 pts\n- Envenom: 4 pts\n- Dexterity: 22 pts\n \nLevel Requirement: 50 Level\n \nBonus to Dexterity attribute bonus cap: 3\n \nCharged Magic Ability:\n- 30 Charges\n- 30 Max\nFunction: haste\n \nIncreases the target's combat speed.\n \nValue: 20%\nTarget: Self\nDuration: 1:00 min\nCasting time: instant\n \n- This spell is cast when the item is used.\n \nCan use item every: 1:30 min\n \n \nBonus Level: 39\n",
  "slot" : 4,
  "abilities" : [ {
    "max_charges" : 30,
    "spell" : 3838,
    "magic_type" : 6,
    "power_level" : 50,
    "position" : 1
  } ],
  "artifact" : false,
  "material" : 0,
  "name" : "Gem of the Skulking Assassin",
  "usable_by" : [ 0 ],
  "realm" : 0,
  "id" : 33173,
  "category" : 5,
  "use_duration" : 90,
  "bonuses" : [ {
    "id" : 118,
    "type" : 2,
    "value" : 4
  }, {
    "id" : 19,
    "type" : 2,
    "value" : 4
  }, {
    "id" : 117,
    "type" : 2,
    "value" : 4
  }, {
    "id" : 1,
    "type" : 1,
    "value" : 22
  }, {
    "id" : 1,
    "type" : 28,
    "value" : 3
  } ],
  "ability_tags" : [ "fn_combat_haste" ]
}
How is utility calculated?