The power is all hers (Patreon)

Sienna was able to syphon the powers, not just of her deceased fathers sword, but also from a dozen relics she tracked down that possesed powers of their own. Claiming all of their powers for herself, transformed her into a new being, one of unrivalled power, so much so the raw strength she now wielded manifested itself physically onto her frame. Sienna looked into the mirror pleased with herself, ready to turn her predator into prey.

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The original pic was suggested on my Discord server by Impy. I really liked it. I am not familiair with the source material but apparantly its from the film the terrifier 2.