Chemikinesis-Increasing Toxicity.

I'll get straight to the point. You may know apples contain cyanide.
A. Feel the apple's energy, and locate the toxin. It may be in the seeds, so focus here.
B. Remember the feel of this energy, and spread your focus throughout the apple. Feel the energy in the apple (the non-toxic energy) change to become the poison-imbued energy. In other words, add the poison-energy to the apple's normal energy.
C. Add lots of this, making it denser, compact it.
Congratulations, you have made a very weak poison stronger.