Barrier Master

The Barrier Master is an Emblem Heartless that is found in Kingdom Hearts 358/2 Days.

Kingdom Hearts 358/2 Days

 * Agrabah
 * Twilight Town
 * Beast's Castle

Kingdom Hearts 358/2 Days
''These mid-sized Heartless are accomplished mages. While not aggressive, they grant allies an impenetrable barrier.'' ''Attack them until dizzy to make them drop their books, disabling any active barriers. The fallen books can then be knocked away.'' ''They have high defense, but are vulnerable to magic. Exploit that fact.''

Strategy
The Barrier Master uses its large book as a shield, similar to the defensive methods used by the large-bodied Heartless. It can only be attacked when separated from the book, which is also used as a weapon with magical powers, the Heartless stunned upon this separation. Due to this Heartless occasionally appearing with another stronger Heartless, the stronger Heartless cannot be hit as the Barrier Master is protecting it with a spell. The only way to remove this spell is to defeat the Barrier Master.