Mortal Blow Shadow combination method is explained in this Combination Scroll.
You can obtain 1 Mortal Blow Shadow item a combining them with materials.
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[Required materials]
50x Fang of Hatii
25x Shadowdecon
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[Obtainable items]
Mortal Blow Shadow Earring, Mortal Blow Shadow Pendant, Mortal Blow Shadow Weapon
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Weight: 1