"Can I bear to kill it?" Inala muttered as he sprinted through the channel, cursing in response immediately after, "Fuck no! Whether or not it's my child, I cannot kill a baby!"
The Boar King had a vengeance to fulfil against the Empyrean Tusks. In Sumatra Chronicles, it annihilated Resha's Mammoth Clan and killed all Empyrean Tusks.
The Boar King had a Nature of devouring and assimilating the natures of all his prey. As he had consumed enough Empyrean Tusks, he had their nature too. Meaning, the moment the newborn—Empyrean Tusk baby—lets out even the faintest of cries, the Boar King would sense her location.
And he will come here immediately. The hive-mind nature of an Empyrean Tusk allows it to pick up a newborn Empyrean Tusk's cries from far away.