[ It's definitely strong. Strong enough that Assassin doesn't want to face it head-on again, definitely not. He's thankful for the barrier here, the safety granted by Saber's magic weapon finally proving to be of some use after all. ]

It is, and a cornered rat with defend its home with great ferocity. But it is still a rat, surely we can take it down with our skills and wiles.

[ It would be a sad day when they can't outsmart a literal rat, no matter how big it is. Assassin parries a claw with his sword, keeping them safe for as long as possible, but he can't quite do any permanent damage despite his skills. The rat's hide is just too thick for that. ]

So, you are the king, and I am but a lowly swordsman. How should we get past this?

[ He has a few ideas, but he also wants to put Saber on the spot. Because it's fun. ]