Exceptional Avernal Maligned Drum

Instrument

Item Details

Utility 32
Bonus Level 20
Dyeable No
Sellable Yes
Tradeable Yes

Restrictions

Level Required Any
Usable By
Bard

Magical Bonuses

Basic
Charisma 9
Music 4
ToA
ToA Overcap - Charisma 3

Raw Item JSON

{
  "sell_value" : 19462,
  "requirements" : {
    "usable_by" : [ 48 ]
  },
  "bonus_level" : 20,
  "sources" : {
    "stores" : [ "Hib Emerald Staves/Instruments" ]
  },
  "flags" : {
    "dyable" : false,
    "emblemizable" : false
  },
  "icon" : 2971,
  "utility" : 32.0,
  "delve_text" : "Realm: Hibernia\n \nUsable By: \n- Bard\n \nMagical Bonuses:\n- Charisma: 9 pts\n- Music: 4 pts\n \nBonus to Charisma attribute bonus cap: 3\n \n \nBonus Level: 20\n",
  "salvage_amount" : 53,
  "artifact" : false,
  "material" : 38,
  "name" : "Exceptional Avernal Maligned Drum",
  "usable_by" : [ 48 ],
  "realm" : 3,
  "id" : 34145,
  "category" : 4,
  "bonuses" : [ {
    "id" : 7,
    "type" : 1,
    "value" : 9
  }, {
    "id" : 109,
    "type" : 2,
    "value" : 4
  }, {
    "id" : 7,
    "type" : 28,
    "value" : 3
  } ],
  "ability_tags" : [ ]
}
How is utility calculated?