Oubliette Arcana

When an enemy WIZARD successfully casts a spell
within 30" of the bearer, instead of attempting to
unbind it you can declare that the Oubliette Arcana
will attempt to capture the magical energies. Roll
a dice. On a 6+ the spell is negated and has no effect.
In addition, that spell may not be cast again by
that WIZARD for the rest of the battle.