I will post all the R18 chapters together as early-release Powerstone Bonus chapters.
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After successfully obtaining the "Tears of the Elves" from Lilith, when Renji was preparing to contact the succubus through a dream, this time Lena appeared not in person but only left a pre-prepared afterimage. She left a semi-finished patch resembling a plant seed in the dream, telling Renji how to make the complete version of the patch.
The method was simple, almost like nurturing a seed. Renji just needed to drop the Tears of the Elves onto it. After doing so, the transparent droplets were quickly absorbed by the seed. Fortunately, it didn't sprout as Renji had imagined, which would have been too absurd. Instead, it just grew in size and changed from the original "seed" shape to something like a "capsule."
[Zero's Patch (Enhanced Version)]
[Effect: Repair Mechanical Loss of Control]