Build the Desert

Ryan James Scott. (Phos, Ale, and Ariana helped with this as well.)

Hello. I have come for you. You have the power to create any biome of your choice. One biome, in particular, is what we want you to make. Please make a desert for me. Thank you. Or not, I don't care. I may try to stop you though...
Let's continue
Wait, Why Me?