Editing Creating Magical Effects (section)

===Sphere Countermagic===

This occurs when you have the Spheres necessary to know what the opponent is doing. You pit your Arete against the enemy's. In
such a case, you make an Arete Test, at the same difficulty as the opponent (although you take your modifiers for distractions and Resonance into effect). If you win, the spell is canceled. If you have Apprentice-level (or better) Prime and your Arete is higher than the opponent's, the Effect can be reflected back upon him, so he might be hit by his own fire bolt or wounding spell.