It had been a month since the contest began and the grade 4 alchemists were reaching the climax of their process. Lind had missed some because he had to sleep and eat but the 2 Vice-Sect Masters had given him their observations.
Neither were alchemists but both were expert cultivators and had seen much in their tenure helping lead the sect over the centuries. Lind appreciated it all but the final moment left him in awe.
Magda's was indeed the Refraction Pill as she set up several artifacts around the bubbling cauldron. Her ability to control her Qi to the cauldron while setting up the final step spoke to her level of control.
Lind saw with his Eyes light and fire at extremely high quality gather in the artifacts and she must have taken control as lightning began to wrap the dark metal of the cauldron. It flared with the power as bright white lightning seemed to dance in the formations on it.