Everyone—including Prince Damien of Southlyn—thought Serena had gone to compound an antidote for the Inner-Force Dissolving Powder, but only Prince Nolan knew the truth: Serena had gone to kill.
Compound an antidote?
What a joke. Serena doesn't even know how to detoxify poisons, and even if she did, there's no way she could make it in time. Even if she somehow did, no one here has the luxury to take medicine, let alone wait for it to work.
Instead of wasting time trying to make an antidote, it's better to deal with the men Prince Damien left by the cliff to ignite the fire—so the Black Riders can get up here.
Prince Damien brought only a limited number of experts from overseas. After leaving some behind in Night City to help Reid Yale defend, he didn't have many left to bring here. So for guarding the cliff and lighting the fire, he definitely wouldn't use his best fighters. Serena could handle these men easily.
Such a simple solution—why hadn't the martial artists or Prince Damien thought of it?
It's not that they hadn't thought of it—they couldn't act even if they did. Prince Damien's men pushed them into a tight circle; there was no way to break out. And if they did, and Prince Damien realized their intent, he'd just toss a firebrand down and all their effort would be wasted.
But Serena was different. Everyone assumed she was off making medicine—but in reality, she was out killing!
Gunshots would be heard instantly. To avoid alerting Prince Damien and his men, Serena had to give up her gun and switch to hidden weapons made by Left Shore.
Serena didn't want to take such a risk, but her gun didn't have a silencer.