"You can cast powerful, complicated magic if you use magical runes in the right way." She sketched a basic Laboratory rune in the air, infusing it with the barest amount of mana. It wasn't functioning, but the lines and words spun visibly with faint golden light. "This is a storage-type Rune. It contains a laboratory, and this..." She poured out the contents of the vial, a thick, viscious liquid, and placed her hand over it, "will be a familiar."
A burst of her remaining mana later, and the goo ballooned into a sphere the size of a person's head. As Lillet turned to smile at Day, it was sprouting a mouth and eyes.