Greater Mythirian of Siphoning

Other Mythirian

Item Details

Utility 50
Bonus Level 50
Dyeable No
Sellable Yes
Tradeable Yes

Restrictions

Level Required Any
Usable By
All Classes

Magical Bonuses

ToA
Arcane Siphon 10%

Raw Item JSON

{
  "sell_value" : 500000,
  "requirements" : {
    "champion_level_required" : 6
  },
  "bonus_level" : 50,
  "sources" : {
    "stores" : [ "TL room scrolls & mythirians", "greater Myth" ],
    "monsters" : {
      "normal_drop" : [ "Bonedancer Winston", "Necromancer Aroslo", "Spectramancer Gozier", "Forge Foreman Fogo", "Tiller Prime Peche", "Prelate Quietus II", "Master Norr'ice", "shade of Prelate Quietus I" ]
    }
  },
  "flags" : {
    "dyable" : false,
    "emblemizable" : false
  },
  "icon" : 3551,
  "utility" : 50.0,
  "delve_text" : " \n - Requires: Champion Level 6\n \n  (This Mythirian will give you a chance to not use energy when casting a spell or using a bow.)\nMagical Bonuses:\n \nArcane Siphon: 10% chance to cast a spell or fire a bow without expending energy.\n \n \nBonus Level: 50\n",
  "slot" : 17,
  "artifact" : false,
  "material" : 0,
  "name" : "Greater Mythirian of Siphoning",
  "usable_by" : [ 0 ],
  "realm" : 0,
  "id" : 59367,
  "category" : 8,
  "bonuses" : [ {
    "id" : 1,
    "type" : 35,
    "value" : 10
  } ],
  "ability_tags" : [ ]
}
How is utility calculated?