there are some who say......
that the day of purim was by laws of מזלות, a bad
day for jews and a good day for haman to
wipe them out
so the fact that in the end on that day it became
אשר ישלטו המה בשונאיהם is a huge nes of שידוד מזלות ומערכות because it was a total opposite
שיף דרשות (end of chullin )even adds it was a true
כי בדבר זדונלה