Who is the king cobras biggest nemesis?

The king cobra's only notable predator is the mongoose, which can hunt king cobras due to its immunity to the cobras neurotoxin. However, the king cobra's defense tactic of extending its hood, standing, and hissing a low hiss is usually successful in intimidating an attacking mongoose into leaving it alone, coupled with the fact that most of the mongoose's other prey is much easier to kill than a cobra.