Corrupted Bark shield

Shield Medium Shield

Item Details

Utility 51
Bonus Level 26
Dyeable Yes
Sellable Yes
Tradeable Yes
Damage Info
DPS 16.5
Speed 4.3

Restrictions

Level Required Any
Usable By
All Classes

Magical Bonuses

Basic
Thrust Resist 4%
Parry 3
Spirit Resist 4%
Shield 4

Raw Item JSON

{
  "sell_value" : 40056,
  "type_data" : {
    "dps" : 16.5,
    "shield_size" : 2,
    "speed" : 4.3,
    "clamped_dps" : 16.5
  },
  "bonus_level" : 26,
  "sources" : {
    "monsters" : {
      "normal_drop" : [ "Kontar the Corrupt" ]
    }
  },
  "flags" : {
    "dyable" : true,
    "emblemizable" : true
  },
  "icon" : 61,
  "utility" : 51.0,
  "delve_text" : "Realm: Hibernia\n \nMagical Bonuses:\n- Shield: 4 pts\n- Parry: 3 pts\n- Thrust: 4%\n- Spirit: 4%\n \n \nDamage Modifiers (when used with shield styles):\n- 16.5 Base DPS (16.5 Clamped DPS)\n- 4.3 Shield Speed\n \n \nBonus Level: 26\n",
  "salvage_amount" : 10,
  "artifact" : false,
  "material" : 67,
  "name" : "Corrupted Bark shield",
  "usable_by" : [ 0 ],
  "realm" : 3,
  "dye_type" : 0,
  "id" : 21529,
  "category" : 3,
  "bonuses" : [ {
    "id" : 43,
    "type" : 2,
    "value" : 4
  }, {
    "id" : 8,
    "type" : 2,
    "value" : 3
  }, {
    "id" : 3,
    "type" : 5,
    "value" : 4
  }, {
    "id" : 17,
    "type" : 5,
    "value" : 4
  } ],
  "ability_tags" : [ ]
}
How is utility calculated?