Stifle Spell

Abjuration
Level: Cleric 4, sorcerer/wizard 4
Components: V
Casting Time: 1 immediate action
Range: Close (25 ft. + 5 ft./2 levels)
Target: One creature casting a spell
Duration: Instantaneous
Saving Throw: See text
Spell Resistance: Yes

As the creature casts a spell, you utter a
simple magical phrase that momentarily
confounds it.

You cast this spell to distract another
creature as it attempts to cast a spell.
The target must succeed on a Concentration
check (DC equal to 14 + your key
ability modifi er + the level of the spell
being cast) to ignore the distraction, or
else it loses the spell.