Who killed the King in Hunter X Hunter?

Right after Meruem aka King finished his fight against Netero, he ended up getting poisoned and faced death.

Hunter x Hunter: 10 most unsettling characters

Komugi, Wiki

Watch Hunter X Hunter (2011)

10 Most Important Hunter X Hunter Deaths (In Order)

Meruem, Hunterpedia

The 10 Best 'Hunter X Hunter' Villains, Ranked

How did Meruem and Komugi die in Hunter X Hunter? - Quora

Hunter X Hunter - 5 People Who Can Kill Meruem

10 most powerful Nen users in Hunter X Hunter (2011)

Tag yourself HxH edition (i keep doing these for fun hehe) : r/HunterXHunter

hunter-x-hunter-chimera-ant-king-bloody-teeth

Meruem, Hunterpedia

10 Strongest Nen Users in Hunter x Hunter