Obviously, they will need to be killed in one hit. The only surefire ways to do so are by taking off the head, or piercing the heart.

[...piercing the heart.

Ahaha.

Still probably a little awkward to mention.

...and there's more, right. Warning the troops is important enough that he probably should get this out, even if he'd hoped not to bring it up because Yukimura will probably take it as one more thing to worry about -]

They are weaker by daylight.