Starforge can only drop from the Shaper in the Shaper's Realm. It cannot be chanced. This item can be acquired through the following upgrade paths or vendor recipes:
30% increased Global Accuracy Rating
(400-500)% increased Physical Damage
(5-8)% increased Attack Speed
+(90-100) to maximum Life
20% increased Area of Effect for Attacks
Deal no Elemental Damage
Your Physical Damage can Shock
The end is written into the beginning.
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