Summoned? Like a familiar?

[ It's that alone that causes Shirou to feel confused, brows raising to question the situation he's in. It doesn't make any sense. ]

I don't have the magic circuits to do a single summoning, much less summoning a human...

[ Or something that looks similar to a human, at least, from his comprehension. ]

The command seals...? [ He glances at his hand with the markings that indicate that he is a Master. ] You mean this?