Soul Spell Matrix

Summary
It was an unbelievably complicated construct of energy and magic, created by combining a countless number of symbols and energy lines. It was this matrix that held together his current body, and his soul. It was perfectly fused within him, such that it would be impossible to remove.(His body was a black blob)

Actual explanation
All beings, no matter how big or small, across the 30,000 Worlds have within them a Soul Spell Matrix. It is through this Matrix that they grow stronger and are able to learn new abilities or powers.