I would. [ It seems he understands that much but not the rest. ] These Command Seals cannot be used on Servants that I do not control. They are unused from the previous Holy Grail Wars. These are essentially all that is left from the defeated Servants.

[ Stepping forward, he takes hold of Tatsumi's hand. A small glow and the used Seal is "returned." ] If I could, I would have commanded all Servants to kill themselves. I'm uncertain, however, how you would view that, young Master. [ Because that is what his morals and common sense tells him what he should do. If he has the power, they should be sacrificed so that no Master need die and finish the ritual. So long as it can be held off -- what? What, then? ]

Well. What do you think of that?