Spellbound Cobalt Drum

Instrument

Item Details

Utility 38.67
Bonus Level 20
Dyeable No
Sellable Yes
Tradeable Yes

Restrictions

Level Required Any
Usable By
All Classes

Magical Bonuses

Basic
Dexterity 16
Heat Resist 5%
Cold Resist 5%
Spirit Resist 4%

Raw Item JSON

{
  "sell_value" : 32076,
  "bonus_level" : 20,
  "sources" : {
    "stores" : [ "Hib Aurulite 40" ]
  },
  "flags" : {
    "dyable" : false,
    "emblemizable" : false
  },
  "icon" : 2971,
  "utility" : 38.666666666666664,
  "delve_text" : "Realm: Hibernia\n \nMagical Bonuses:\n- Cold: 5%\n- Dexterity: 16 pts\n- Heat: 5%\n- Spirit: 4%\n \n \n \nBonus Level: 20\n",
  "salvage_amount" : 5,
  "artifact" : false,
  "material" : 39,
  "name" : "Spellbound Cobalt Drum",
  "usable_by" : [ 0 ],
  "realm" : 3,
  "id" : 46349,
  "category" : 4,
  "bonuses" : [ {
    "id" : 12,
    "type" : 5,
    "value" : 5
  }, {
    "id" : 1,
    "type" : 1,
    "value" : 16
  }, {
    "id" : 10,
    "type" : 5,
    "value" : 5
  }, {
    "id" : 17,
    "type" : 5,
    "value" : 4
  } ],
  "ability_tags" : [ ]
}
How is utility calculated?