Magic Barrier (魔法障壁 Mahō Shōheki) is a Caster Magic which allows the user to create magical walls.
A defensive form of Magic which allows the user to summon forth transparent rectangular barriers from the ground. The barriers are supposedly quite durable, only breaking before someone as superhumanly strong as Natsu Dragneel, the Dragon Slayer thrusting his full force upon one. As an added benefit, from the user's perspective, the barrier allows magical attacks to pass through them from the inner side, while at the same time preventing foes from approaching the caster.
- Fairy Tail Manga: Chapter 433, Pages 4-7