circle

Do you mean a summoning circle like in FullMetal Alchemist? [Draw symbols on the ground, place your hands on the circle and summon physical objects] that isn't real. Some people have circles with runes and whatnot depending on the path but don't expects sparks and physical creations.

You can use a basic circle, it comes down to how well you cast it, but I wouldn't go around summoning things, research the being so you know how to summon and banish them if things go south. But regarding 'summoning circles' you can use a basic circle provided you know how to cast one.