Tiger beetle 
Send massage.
It feels like you can see a progression in power throughout this episode.. She starts with small things like altering athe spellbook itself, her fainting couch. Then she moves to changing bigger things - apple carts, buildings, the road system, and can spawn smaller objects like a crystal armor or a dress. And at the end, she can alter multiple objects with ONE magical outburst and conjure up several Rariots. I wonder if Spike had hesitated longer, would the spell get such a strong hold on her brain it would refuse to release her?