Spellbound Sapphire Drum

Instrument

Item Details

Utility 32
Bonus Level 16
Dyeable No
Sellable Yes
Tradeable Yes

Restrictions

Level Required Any
Usable By
All Classes

Magical Bonuses

Basic
Dexterity 12
Heat Resist 4%
Cold Resist 4%
Spirit Resist 4%

Raw Item JSON

{
  "sell_value" : 11664,
  "bonus_level" : 16,
  "sources" : {
    "stores" : [ "Hib Aurulite 30" ]
  },
  "flags" : {
    "dyable" : false,
    "emblemizable" : false
  },
  "icon" : 2971,
  "utility" : 32.0,
  "delve_text" : "Realm: Hibernia\n \nMagical Bonuses:\n- Cold: 4%\n- Dexterity: 12 pts\n- Heat: 4%\n- Spirit: 4%\n \n \n \nBonus Level: 16\n",
  "salvage_amount" : 5,
  "artifact" : false,
  "material" : 37,
  "name" : "Spellbound Sapphire Drum",
  "usable_by" : [ 0 ],
  "realm" : 3,
  "id" : 46289,
  "category" : 4,
  "bonuses" : [ {
    "id" : 12,
    "type" : 5,
    "value" : 4
  }, {
    "id" : 1,
    "type" : 1,
    "value" : 12
  }, {
    "id" : 10,
    "type" : 5,
    "value" : 4
  }, {
    "id" : 17,
    "type" : 5,
    "value" : 4
  } ],
  "ability_tags" : [ ]
}
How is utility calculated?