I summon them from wherever in the world they are. It's faster than waiting for them to walk to me.

That's how magic works, gob-head! Different kinds of land have different kinds of mana in them, and you draw that mana from the land and use it to cast spells. Just because you're too stupid to know about it doesn't mean you can pretend it doesn't exist! Even goblins aren't that dumb!

[Oooh, sick burn~! ...If Blake had any reference point for the intelligence of what are to him mythological creatures.]