The effectiveness of the given metaphor is to show that the curse works in different, opposite ways.
What is a Metaphor?
This refers to the figure of speech that is used to make comparisons between two dissimilar items.
Hence, we can see that from the given metaphor, a curse is described as being a two-edged sword and also swift and this means that the curse is effective and has direct and opposite functions.
Read more about metaphors here:
https://brainly.com/question/9418370
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