Spellbound Indigo Drum

Instrument

Item Details

Utility 40
Bonus Level 22
Dyeable No
Sellable Yes
Tradeable Yes

Restrictions

Level Required Any
Usable By
All Classes

Magical Bonuses

Basic
Dexterity 21
Heat Resist 5%
Cold Resist 3%
Spirit Resist 5%

Raw Item JSON

{
  "sell_value" : 51030,
  "bonus_level" : 22,
  "sources" : {
    "stores" : [ "Hib Aurulite 49" ]
  },
  "flags" : {
    "dyable" : false,
    "emblemizable" : false
  },
  "icon" : 2980,
  "utility" : 40.0,
  "delve_text" : "Realm: Hibernia\n \nMagical Bonuses:\n- Cold: 3%\n- Dexterity: 21 pts\n- Heat: 5%\n- Spirit: 5%\n \n \n \nBonus Level: 22\n",
  "salvage_amount" : 5,
  "artifact" : false,
  "material" : 71,
  "name" : "Spellbound Indigo Drum",
  "usable_by" : [ 0 ],
  "realm" : 3,
  "id" : 46409,
  "category" : 4,
  "bonuses" : [ {
    "id" : 12,
    "type" : 5,
    "value" : 3
  }, {
    "id" : 1,
    "type" : 1,
    "value" : 21
  }, {
    "id" : 10,
    "type" : 5,
    "value" : 5
  }, {
    "id" : 17,
    "type" : 5,
    "value" : 5
  } ],
  "ability_tags" : [ ]
}
How is utility calculated?