Rebuke

Enchantment Tier: 2 Components: Verbal Casting Time: 1 major action Range: 40 ft Target: 1 living creature Duration: 1 round/level Saving Throw: Spell negates Your word holds power, and the subject stumbles backwards with the force of it.

When the spell is cast, the subject is dazed for 1 round and shaken for the duration of the spell. Furthermore, a spellcaster targeted by rebuke must make a successful Concentration check (DC equal to the save DC for this spell + the level of the spell being cast) to cast spells while under its effect.