Brand's effect in battle is sealing a foe's psynergy.
When Set, Brand increases its Adept's base HP by 8, base Psynergy Points by 4, base Defense by 2, and base Agility by 3. When Brand is unleashed in battle, the target is afflicted with the Psynergy Seal status condition, which prevents it from using Psynergy (i.e. an effect that would consume PP), just like the Bind Psynergy. Unlike the Bind Psynergy, which has very iffy accuracy, Brand is guaranteed to inflict Seal on the enemy it is used on. In Dark Dawn, Brand's unleash animation visually resembles the 3D model of Brand appears in front of the target, then disappears after a moment. What follows is identical to the visual of the Bind Psynergy - the purple Psynery Seal symbol rotates at the enemy's place while it and the enemy are surrounded by a field of multiple, multi-colored rings that gather into the symbol.