Turning invisible is quite easy once you get the hang of it.
1. charge your physical energy for a while. Then place a stone or another small object(stone is recommended) in front of you.
2. Close your eyes. Visualize the stone in front of you.
3. Imagine that your aura is surrounding you.
4. Imagine that the aura is becoming one with the stone.
5. Slowly, imagine that the stone is dissapearing.