Drum of the Druids

Instrument

Item Details

Utility 23.67
Bonus Level 7
Dyeable No
Sellable Yes
Tradeable Yes

Restrictions

Level Required Any
Usable By
All Classes

Magical Bonuses

Basic
Acuity 13
All Casting 1
ToA
Arcane Siphon 2%

Raw Item JSON

{
  "sell_value" : 54000,
  "bonus_level" : 7,
  "sources" : {
    "monsters" : {
      "normal_drop" : [ "Gwern" ]
    }
  },
  "flags" : {
    "dyable" : false,
    "emblemizable" : false
  },
  "icon" : 2971,
  "utility" : 23.666666666666664,
  "delve_text" : "Realm: Albion\n \nMagical Bonuses:\n- ALL magic skills: 1 pts\n- Acuity: 13 pts\n \nArcane Siphon: 2% chance to cast a spell or fire a bow without expending energy.\n \n \nBonus Level: 7\n",
  "salvage_amount" : 22,
  "artifact" : false,
  "material" : 36,
  "name" : "Drum of the Druids",
  "usable_by" : [ 0 ],
  "realm" : 1,
  "id" : 15250,
  "category" : 4,
  "bonuses" : [ {
    "id" : 303,
    "type" : 2,
    "value" : 1
  }, {
    "id" : 10,
    "type" : 1,
    "value" : 13
  }, {
    "id" : 1,
    "type" : 35,
    "value" : 2
  } ],
  "ability_tags" : [ ]
}
How is utility calculated?