Her eyes fell upon an incantation that seemed to offer her the ultimate solution. It read, "This spell is used to undo the most recent effect of an enchanted object. Must be spoken by the target of said object."
"Here goes nothing," Amy muttered. She spoke the strange words carefully, hoping she had gotten it right. Suddenly something gave a forceful tug on her neck and she was flung out of the chair and over the counter. She was moving so fast, the aisles were a blur and she hadn't even touched the ground before something collided with her. Landing in a heap, she rubbed the bruise she already had from her trip in the store's doorway, which now hurt even worse. Then she realized she couldn't feel the weight of her shirt. As the stars faded from her eyes, she saw that it had been blown off during her involuntary flight and that she was naked save for her boots...and some black rope that was draped over her crumpled form. Swallowing hard, she felt a disturbingly familiar constriction around her throat.
"Aw, no freaking way," Lina groaned. Amy looked up, and saw the giant shape of her friend's legs. Lina sat up, tugging the black leash in her right hand, which was attached by its loop to her left wrist. "What did you do?!"
"I was trying to undo the effects of the collar!" Amy defended. "The spell was supposed to undo the most recent change made by...an object." She wanted to kick herself. The most recent change was made by the eraser stone! "Okay, no problem. We just have to get back to the eraser and remove this again."
"Know how to get there from here?" Lina asked. Amy looked at the shelves and didn't recognize anything. "I was in the clothing section looking for a wonder bra. Like, a REAL wonder bra. Next thing I know my arm is getting pulled across the store like it was tied to a truck. Hope we can find it fast. I'm starting to hate being an eight-foot giantess."
"I think I can get us back..." Amy said, not sounding very convincing. "Let's hurry, before there's no height left in me to sap!"