The next morning, Billy didn't even try to help the samurai. He just told Sei to make his men bold their ground while he would do his own thing. He didn't want to give more details than that because he also wanted to keep his abilities hidden, at least most of them.
In any case, as soon as he arrived on the battlefield, Billy opened his path with his glaive. Now that he had Heroic Spearmanship, the ice Golems felt like butter when he was cutting them. Regardless, once he got far away from the samurai, he began to use Flash while ignoring most of the enemies around. That only worked because he used Destructive Aura alongside it.
Some golems tried to stop him and even tried to chase Billy, but they only worked to make him recover the mana spent. His glaive reaped their heads easily and then fell deal. They couldn't even be considered obstacles.