Gentle Fist (3.5e Maneuver)

''Your opponent braces for what he expects to be a jarring blow from your open palm, but instead only receives a hit more akin to a light pat. When he tries to unleash his magic, however, his spells fizzle, and he grows increasingly flustered as he realizes he is helpless before you.''

When you use this strike, you may forgo the damage dealt to render your opponent unable to cast spells, manifest powers, initiate maneuvers, or use spell-like or supernatural abilities until the end of their next turn. In addition, all magical effects and maneuvers affecting the victim are subject to an initiator level check against a DC equal to 10 + the initator level, manifester level, or caster level of the source (roll once and measure this check against all the DCs). If this check succeeds and you desire it, the effect is ended. Passive magical item abilities (like the armor enhancement bonus provided by armor) are not negated by this effect.