Hraxzharik is an elder fiend of one of the lower planes. His mass stretches the entirety of his plane, undulating and mutating upon itself.
Hraxzharik is apparently the progenitor of the demon Yyk Sen, according to Razodon Goswin. When Yyk Sen distinguished her consciousness from the demon and broke away from him, she stole seven of his hellhearts to augment her power.