Spellbound Sapphire Drum

Instrument

Item Details

Utility 34
Bonus Level 15
Dyeable No
Sellable Yes
Tradeable Yes

Restrictions

Level Required Any
Usable By
All Classes

Magical Bonuses

Basic
Strength 12
Thrust Resist 4%
Body Resist 4%
Instruments 2

Raw Item JSON

{
  "sell_value" : 14256,
  "bonus_level" : 15,
  "sources" : {
    "stores" : [ "Alb Aurulite 30" ]
  },
  "flags" : {
    "dyable" : false,
    "emblemizable" : false
  },
  "icon" : 2971,
  "utility" : 34.0,
  "delve_text" : "Realm: Albion\n \nMagical Bonuses:\n- Instruments: 2 pts\n- Strength: 12 pts\n- Thrust: 4%\n- Body: 4%\n \n \n \nBonus Level: 15\n",
  "salvage_amount" : 5,
  "artifact" : false,
  "material" : 37,
  "name" : "Spellbound Sapphire Drum",
  "usable_by" : [ 0 ],
  "realm" : 1,
  "id" : 45691,
  "category" : 4,
  "bonuses" : [ {
    "id" : 98,
    "type" : 2,
    "value" : 2
  }, {
    "id" : 0,
    "type" : 1,
    "value" : 12
  }, {
    "id" : 3,
    "type" : 5,
    "value" : 4
  }, {
    "id" : 16,
    "type" : 5,
    "value" : 4
  } ],
  "ability_tags" : [ ]
}
How is utility calculated?