Q: As there are 10 sefirot and 10 plagues that befell Egypt, there is almost surely a correspondence between them. What would that correspondence be?
A: Each plague represents the nullification of the being of the 10 negative sefirot, which stand opposite the 10 positive sefirot.
This occurs in ascending order:
Blood Malchut
Frogs Yesod
Lice Hod
Wild Animals Netzach
Animal Plague Tiferet
Boils Gevurah
Hail Chesed
Locusts Binah
Darkness Chochma
Firstborn Keter
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