Casting Time 1 immediate action
Schools: Abjuration

EFFECT
Range medium (100 ft. + 10 ft./levels)
Target one creature
Duration Instantaneous
Saving Throw None; Spell Resistance yes
Base MP Cost: 5

DESCRIPTION
When the caster sees a creature within the spell’s range casting a spell, they may attempt to interrupt the cast. If it is casting a spell with a cost of 5 MP or lower, the spell fails and has no effect. For a spell with higher MP cost, make an ability check using your spellcasting ability. The DC equals 10 + the effective spell level of the spell. On a successful check, the spell fails and has no effect.

Active Augmentation: You may spend as much MP as you desire on this spell, so long as it is 5 or more. The final MP cost determines what may be instantly ended.