The alliteration created with the "sh" sound in the phrase "shivering shock" can evoke a sense of fear, tension, or anticipation, depending on the context of the stanza. The repetition of the "sh" sound creates a harsh and sudden impact, mimicking the sound of a shiver or a sudden shock. This helps to amplify the intensity and urgency of the situation being described in the stanza. Overall, the alliteration contributes to the tone of the stanza by adding a layer of uneasiness or surprise to the imagery or emotions being conveyed.