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The Golden Lightning Fortification is an defensive Erdtree Incantation in Elden Ring, dropped by a Teardrop Scarab in Crumbling Farum Azula.
The Golden Lightning Fortification is obtained from hunting down a Teardrop Scarab in Crumbling Farum Azula. To find it, you'll need to use the Dragon Temple Lift locked behind a Sealed Imp Gate using 2 Stonesword Keys. Once on the roof of the temple, move up and right to see it scurrying towards a dragon.
Golden Lightning Fortification greatly increases lightning resistance for self and allies