Kael was already following through with his next move. Though he was now marked invulnerable, and he trusted the system, mere invulnerability wasn't enough to guarantee that he could keep the knight away...more importantly, the crossbow bolts plated one with metal, and while it didn't seem particularly strong and could probably be broken with enough strength, it would still prove a hindrance. However, on one hand, the backpack carrying the anti-metal solvent had by now drifted close enough to reach out and grab. On the other hand, there was a lesson Kael remembered about the different means of enchanting oneself to move faster. One could simply cast a speed enchantment, but to do so meant one also had to increase the speed of their perceptions, otherwise their body would move faster than they can control, or they would not be able to react fast enough to an event for their speed to matter. The other method is to increase the speed of the passage of time on oneself...to their perception, it will be as if time slowed down around them. Forces will still act on them in their own time, such as gravity or being struck with a set force, but everything not part of the spell will move and take effect far slower. And for Kael, who's chiefest need at the moment was time to act, that was perfect.
Chicken? He could play that. Kael ignores the shot, intent on typing out his next command. How nice of the knight to take his time with quips and flairs as he gives Kael lots of time to finish his plan...
"Alter time Entity VII accelerate 100x"