What is the effect of the image of alchemy in this speech by casca in the tragedy?

In Casca's speech in Shakespeare's "Julius Caesar," the image of alchemy serves to illustrate the transformative and often chaotic nature of political events in Rome. Alchemy, traditionally associated with the attempt to turn base metals into gold, symbolizes the potential for both creation and destruction in the political landscape. Casca's reference to alchemical processes highlights the unpredictable and volatile changes occurring in society, reflecting his fear and confusion about the shifting power dynamics surrounding Caesar's rise. This imagery underscores the themes of transformation and the moral ambiguity inherent in the pursuit of power.