Most spells needed a target to be cast and 'visualizing' helped remove that limitation. But this was not something a beginner could do. It required practice and a lot of experience. He just told her to do it so she could realize how shallow her own knowledge was but to his dismay and utter disbelief, the area in front of her hands lit up with a bright green hue.
The spell was cast on the first try.
The symbols beneath her feet lit up a moment later before disappearing into the ground below. They resurfaced a second later, creating a giant magic circle approximately 20 meters in radius.
The magic circle itself was created from mana from Ma Jiang's body but enhanced several times and then its efficacy further expanded by the powdered droppings of the green horned ocelot which was a creature known for its nature attunement.