Superior Accursed Avernal Drum

Instrument

Item Details

Utility 51
Bonus Level 28
Dyeable No
Sellable Yes
Tradeable Yes

Restrictions

Level Required Any
Usable By
Minstrel

Magical Bonuses

Basic
Charisma 15
Instruments 5
ToA
Toa Magic Damage 2%
ToA Overcap - Charisma 3

Raw Item JSON

{
  "sell_value" : 27921,
  "requirements" : {
    "usable_by" : [ 4 ]
  },
  "bonus_level" : 28,
  "sources" : {
    "stores" : [ "Alb Sapphire Staves/Instruments" ]
  },
  "flags" : {
    "dyable" : false,
    "emblemizable" : false
  },
  "icon" : 2971,
  "utility" : 51.0,
  "delve_text" : "Realm: Albion\n \nUsable By: \n- Minstrel\n \nMagical Bonuses:\n- Charisma: 15 pts\n- Instruments: 5 pts\n \nBonus to magic damage: 2%\nBonus to Charisma attribute bonus cap: 3\n \n \nBonus Level: 28\n",
  "salvage_amount" : 93,
  "artifact" : false,
  "material" : 39,
  "name" : "Superior Accursed Avernal Drum",
  "usable_by" : [ 4 ],
  "realm" : 1,
  "id" : 33988,
  "category" : 4,
  "bonuses" : [ {
    "id" : 7,
    "type" : 1,
    "value" : 15
  }, {
    "id" : 98,
    "type" : 2,
    "value" : 5
  }, {
    "type" : 9,
    "value" : 2,
    "requirement_id" : 5542
  }, {
    "id" : 7,
    "type" : 28,
    "value" : 3
  } ],
  "ability_tags" : [ ]
}
How is utility calculated?