Badb's Wailing Lute

Instrument

Item Details

Utility 49.67
Bonus Level 36
Dyeable No
Sellable No
Tradeable Yes

Restrictions

Level Required Any
Usable By
All Classes

Magical Bonuses

Basic
Dexterity 15
Quickness 7
Music 7

Raw Item JSON

{
  "bonus_level" : 36,
  "sources" : {
    "monsters" : {
      "one_time_drop" : [ "Badb" ]
    }
  },
  "flags" : {
    "dyable" : false,
    "emblemizable" : false,
    "no_sell" : true
  },
  "icon" : 2979,
  "utility" : 49.666666666666664,
  "delve_text" : "Realm: Hibernia\n \nMagical Bonuses:\n- Music: 7 pts\n- Dexterity: 15 pts\n- Quickness: 7 pts\n \n \nCannot be sold to merchants.\n \nBonus Level: 36\n",
  "salvage_amount" : 22,
  "artifact" : false,
  "material" : 71,
  "name" : "Badb's Wailing Lute",
  "usable_by" : [ 0 ],
  "realm" : 3,
  "id" : 10062,
  "category" : 4,
  "bonuses" : [ {
    "id" : 109,
    "type" : 2,
    "value" : 7
  }, {
    "id" : 1,
    "type" : 1,
    "value" : 15
  }, {
    "id" : 3,
    "type" : 1,
    "value" : 7
  } ],
  "ability_tags" : [ ]
}
How is utility calculated?