Evocation [Force]
Level: Sorcerer 3, Wizard 3
Components: V, S, F
Casting Time: 1 standard action
Range: Medium (100 ft. + 10 ft./level)
Effect: One hand of force
Saving Throw: None
Spell Resistance: Yes
A small, spectral human hand springs into existence before your target. It hovers in the air, ready to deliver a backhanded blow.
Like interposing hand, this spell creates a magical construct in the form of a human hand. The hand targets a single opponent of your choice within range. You choose this opponent as you cast the spell. You can target a different opponent with this spell by taking a move action to do so.
When the subject of disrupting hand attempts to cast a spell, the hand punches him. This attack causes no damage, but it forces the subject to make a Concentration check with a DC equal to this spell’s save DC. If the subject fails the check, the hand’s blow ruins his casting attempt.
The hand is about 1 foot long. It has hit points equal to half your full normal hit points, and its AC is 20 (+4 size, +6 natural). It makes saving throws using your total save bonuses and takes damage from spells and attacks as normal.
Focus: A soft glove.
Source: Player’s Handbook II, page 102. Orginally named Bigby’s disrupting hand.