Henry really wanted to keep an eye on Vicky's fight, but after Sarah summoning a tornado, the veil entirely blocked his vision.
Not to mention, both Xinya and Vicky teleported away seconds after their fight began. He could only hope her battle went well.
Instead of worrying about his very capable fiancée, he paid full attention to the cowboy. Before their fight even began, he already changed the duel revolvers into the gatling rifle.
The Prince also summoned his warscythe and immediately ran behind some debris as the large rifle began spewing bullets.
He hid behind a giant boulder, yet Chang's bullets ate through it within moments. Something Bea failed to mention when describing the cowboy's ability was how strong his rifle was exactly.
Each tree in the forest which Bea grew was much stronger than a simple block of reinforced concrete, so Chang's rifle wasn't as effective. However, there weren't any strong covers in this urban setting.