The target is locked in a feedback loop where they will do the same reaction to your attacks as they did in the battle round where this spell was cast. Thus, you can force the target to spend action points on an action that you can anticipate and thus counter.
Target receives a -10 penalty to the skill check copying the same reaction as the former combat round.
You must attack the same target for the spell to take effect, but your attack does not have to be the same.
For example, if your opponent parried your last attack, they will then also try parry your next attack which you can then easily avoid.