Collateral Damage.
The ants are history now. The ant queen was just a pawn to be used and discarded. Her death wasn't even intentional. She died as a consequence of his struggle with the sun god. So there's no mystery to be found in the ant mound. The Colossus came a little too late.
Helios nodded. "I should meet this colossus since there's no one here anymore. It will be a shame if his trip was wasted."
He found it to be a shame if the Colossus had to run here all the way from the headquarters of the church of the sun and yet come to find nothing. So he decided to occupy the Colossus for a while. Let's just say the sun god raised him to be polite.
He was hovering in the air but he suddenly disappeared. There was no need for preparation. He wanted to move and so he moved, very quickly too. There was a flash of light and exploding sound as he broke the speed of sound. He pierced through the supposed impenetrable material of the ant mound like a shooting star to reach the Colossus.