Calcified Earthen Drum

Instrument

Item Details

Utility 60
Bonus Level 34
Dyeable No
Sellable Yes
Tradeable Yes

Restrictions

Level Required 49
Usable By
All Classes

Magical Bonuses

Basic
Hit Points 32
Crush Resist 10%
Charisma 18
Music 4

Primary Ability

Armor Factor Buff Level 49
Charge (30 max)


Raw Item JSON

{
  "sell_value" : 37719,
  "requirements" : {
    "level_required" : 49
  },
  "bonus_level" : 34,
  "sources" : {
    "monsters" : {
      "normal_drop" : [ "Queen Qunilaria" ]
    }
  },
  "flags" : {
    "dyable" : false,
    "emblemizable" : false
  },
  "icon" : 2980,
  "utility" : 60.0,
  "delve_text" : "Realm: Hibernia\n \nMagical Bonuses:\n- Music: 4 pts\n- Charisma: 18 pts\n- Hits: 32 pts\n- Crush: 10%\n \nLevel Requirement: 49 Level\n \n \nCharged Magic Ability:\n- 30 Charges\n- 30 Max\nFunction: shield\n \nAdds to the recipient's Armor Factor (AF), resulting in better protection against some forms of attack. It acts in addition to any armor the target is wearing.\n \nValue: 75\nTarget: Self\nDuration: 10:00 min\nCasting time: instant\n \n- This spell is cast when the item is used.\n \nCan use item every: 1:00 min\n \n \nBonus Level: 34\n",
  "abilities" : [ {
    "max_charges" : 30,
    "spell" : 3852,
    "magic_type" : 6,
    "power_level" : 49,
    "position" : 1
  } ],
  "salvage_amount" : 5,
  "artifact" : false,
  "material" : 71,
  "name" : "Calcified Earthen Drum",
  "usable_by" : [ 0 ],
  "realm" : 3,
  "id" : 23555,
  "category" : 4,
  "use_duration" : 60,
  "bonuses" : [ {
    "id" : 109,
    "type" : 2,
    "value" : 4
  }, {
    "id" : 7,
    "type" : 1,
    "value" : 18
  }, {
    "type" : 4,
    "value" : 32
  }, {
    "id" : 1,
    "type" : 5,
    "value" : 10
  } ],
  "ability_tags" : [ "fn_shield" ]
}
How is utility calculated?