Cato did not go back on his word, especially after witnessing the Red Dragon effortlessly eliminate three Fires of Desolation.
Giants and the Dragon Clan indeed had enmities, but that was all in the past; everyone needed to look forward. Moreover, he had pledged allegiance to Yimixi, the Prince of the Fire Element, even turning against his own kin, having long since forsaken his giant identity.
"This is the forge where I craft weapons."
Cato and Leon, along with the Efreeti, returned to the empty fortress.
It was only now that Leon finally had the leisure to observe the fortress.
It was a massive fortress, which under normal circumstances, should house many Fire Giants. Even if Cato submitted to Yimixi and betrayed his kin, a single person wouldn't normally be able to kill so many Fire Giants. If he could, there would be no need to fear the Fire of Desolation...