Barrier

You create a shimmering, translucent barrier, at least 5ft wide and at most 500ft wide. This barrier has 1d100 * Spellcasting Modifier HP. If an attack is made against the barrier, whether indirectly or directly, this score is decreased. Whilst the barrier is active, no spells can penetrate it.

Upon losing all of its hit points, the barrier fades, its surface burning and crumbling like fabric set aflame.