Certainly! Here's a refined and expanded version of your passage:
As soon as Grey completed the poison refining process, he released the protective wall of spiritual energy that had been containing the volatile fumes. The black pill, now perfected, was swiftly stored away in his storage bag. The moment the barrier dissipated, a heavy, suffocating wave of corrosive energy filled the room, thick and pungent with malice.
But Grey had anticipated this outcome. His shadow, always obedient, swiftly extended across the space, absorbing every trace of the toxic substance before it could reach him. He breathed a quiet sigh of relief, knowing his preparation had paid off. With the air now clear, he stepped out of the cabin, eager for a breath of fresh air.
