Using Blindspots for fun and profit
Everything requires your attention to exist in dreams. Unfortunately, attention is a limited resource. You can only focus your attention on so much, so that leaves blind spots, much like your blind spots when driving a car.
Nothing can exist in these blind spots. So for dream control purposes, that makes them a very powerful weapon, both offensive and defensive. You can move a blind spot onto incoming attacks to neutralize them, or just move it over something to get rid of it.
While these blind spots may destroy everything in their path, they leave creation in their wake. A blind spot is any area you're not putting attention into. Pouring attention into a blind spot dissipates it, necessitating the creation of content to fill that void.
You can probe and collapse these blind spots in different ways. Reach into them physically to pull stuff out or feel around. Turn and look. Probe it with your hearing, or just reach around in it with pure attention. If you want to create something specific inside it, you need a focal point for your attention that is related to your target to act as a seed. Plant something in that void, a sound, a smell, an image, a memory, and generally speaking the dream should form around that seed once the void retreats. Results may vary wildly, but that depends entirely on how you were focusing your attention.
Pay close attention to how things are created in the wake of your blind spot. Try to notice how what you are paying attention to influences the outcome of what is created. Once you figure out that correlation, then you can master dream control.
There you have it, the blind spot, both the ultimate weapon of destruction and the ultimate creation/genesis tool. All made possible by a complete absence of attention