Who is nag and nagina what plan did nagin said to nag to rule garden?

Nag and Nagina are characters from Rudyard Kipling's "Rikki-Tikki-Tavi," part of his "The Jungle Book" collection. They are cobras who plot to kill the human family living in the garden to reclaim their territory. Nagina devises a plan to lure the family’s pet mongoose, Rikki-Tikki-Tavi, into a trap by using a fake snake, enabling them to eliminate their threat and regain control over the garden. Their ultimate goal is to establish dominance in the area by eliminating any potential dangers.