Spell #105790 (possibly named "Item Mage T13 4p Bonus Arcane Power Combustion And Icy Veins") doesn't exist. It may have been removed from the game.
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Item - Mage T13 4P Bonus (Arcane Power, Combustion, and Icy Veins) - Live
Item - Mage T13 4P Bonus (Arcane Power, Combustion, and Icy Veins) - PTR
Item - Mage T13 4P Bonus (Arcane Power, Combustion, and Icy Veins) - PTR 2
Item - Mage T13 4P Bonus (Arcane Power, Combustion, and Icy Veins) - Beta
Item - Mage T13 4P Bonus (Arcane Power, Combustion, and Icy Veins) - Cataclysm