Lux and Helen were seated in a carriage pulled by two horses. They were procured by the middle-aged man who had asked Helen about Robin's whereabouts.
They all traveled non-stop and, according to Lux's estimate, with this speed, they would arrive at their destination within two days.
Although he was very worried about Colette and the others, there's nothing he could do but pray to the Gods that they were safe.
For the time being, Lux shifted all his attention to his Soul Book.
He had eighteen Beast Cores in hand, and half of them were Rank 2 Beast Cores. The Ants had been very generous in giving him these Beast Cores because his scouting massively helped them to forage safely in the areas where the mosquitoes had just finished feeding.
Now that he was dealing with an emergency situation, he immediately used the Rank 2 Beast Cores to upgrade Diablo's progression to the next stage.