El Misterio de Belicena Villca (in English) Chapter 8, Days 13 & 14

As we have seen, the Lords of Tharsis were Christians sui generis, and if the Church would have discovered their real beliefs surely they would have condemned as heretics. But they had always cared on their public manner to express their ideas: far were the times when the House of Tharsis guarded the Cult of the Cold Fire and assumed the obligation of its conservation and diffusion. After the destruction of Tartessos and the oath made by the last Men of Stone, the priority that they had imposed to themselves consisted in to comply with the familiar mission and save the Wise Sword: and for it would be necessary to move remaining unnoticed, concentrated only in their objectives. They didn't forget that the Wise Sword was still waiting in the Secret Cave neither the sentence of the Golems, or Gorren, that's to say, the Hogs, as was contemptuously qualified by the Lords of Tharsis alluding to the sentence written with the blood of the Vrayas.