Upon arriving at the stablemasters, Zak will whisper to Cassie. “Leave this to me. Lead the horses away when I give you the signal. I trust you can see through illusions?” He will first cast Minor Image to place an illusion over the horses, keeping it exactly the same as what the horses look like before the spell was cast. He will then signal Cassie to lead the horses away. He will maintain the illusion of the horses in their original places whilst simultaneously expanding it to make it look as if the real horses aren't present, effectively making them invisible. Once the real horses are too far from the original illusion for the spell to continue, he will abandon his original illusion and quickly cast Major Image to cover the horses, making it seem as if only Cassie and himself are walking away. The original illusion lasts for two rounds after concentration, at which point it will be obvious that the horses have gone.