"If you are a beginner you should be wary of trying this spell. However, this is one of the few spells that can be used by Level Three and a Halves, which is of some consolation."
Dark Arts Defence: Basics for Beginners.[src]

Intercepting a Counter Incantation 'On-the-Go' is a spell technique used to stop and deflect offensive spells while in motion. This requires a quick sequence of sixteen steps.[1]

This spell technique was mentioned on page 68c of Dark Arts Defence: Basics for Beginners, accompanied by schematic designs.


Notes and references