Orakha melted the ground and turned it into lava, intending to create a path of escape for Blola, failing to understand the fact that the body of the Boar King fighting everyone only intended to save Yarsha Zahara.
Following that, he was ready to kill himself. After all, his existence would only cause an implosion to the body of the other Boar King who was within the Attributed Region. Moreover, the Boar King was aware of the existence of the Transcendent Eater.
He had no idea about this in Sumatra Chronicles. And the fact that he learnt of this information was recent was never revealed, for he had been camping at the Gaja Enclave whenever he returned from a ruin's exploration.
In a war of information, even the slightest lack of knowledge results in faulty preparation. Anyone could make this mistake. And now, Orakha had done the same. The problem here was the consequences of his mistake.