All Synn has to do is think of something and it can happen. Of course, if she doesn't keep her mind focused on the task at hand, it can cease to happen, as well. For instance, in order to get No-Nose Nanette to allow Synn to leave Nanette's cave in limbo, Synn used her powers to mentally create a nose for Nanette, or rather, to create the illusion in Nanette's mind that she had a nose. However, once Synn was too far away for her powers to work, Nanette no longer had a nose.

Nanette's nose is really just an illusion, or, maybe more accurately, a hallucination she puts into the minds of others. Wait, did I say "minds"? Really, her powers can affect any animate being, as seen below where she makes animate tentacles that will only respond to No-Nose Nanette believe Nanette is commaninding them to release Synn! This use of her powers to create a synestrophic construct like this is often seen.

Against FemParagon, Synn created an entire synestrophic world in the alien's head. Synn's synesthrophic constructs can be either animate, living, organisms, or inanimate objects. Imagine the powers of Green Lantern's ring except better! If she can think it, she can create it! Above, Synn used her powers to create living playmates for herself named Manga Synn and Poppsie Popp. Below, she devises her own unique method to save a plummetting Tara from one of Dr. Rivits' murderous schemes. Who else would have thought of banana cream pie as a safety device!?!