Of course, the main reason was that Zi Liyuan was incredibly powerful, especially after following him into the Castle of the Undead and directly facing off against the Legendary BOSS, they even managed to kill it.
Just one Spear of Death casually thrown by the Undead Mage Andrew could easily kill her, and that was only a regular attack technique of the Legendary BOSS, not to mention withstanding "Death Storm," a Minor Forbidden Spell, and ultimately killing the BOSS.
Though the foreigners had some powerful final tricks for self-preservation, they still couldn't compare to her man's methods.
Fighting head-on against the Legendary BOSS, they were basically suppressing the opponent throughout the battle. Who else could achieve such a feat at Third Order LV80?
After only a few casual exchanges and a quick tofu meal, the battle on the battlefield was essentially over.