Ballad of the Barrier

You sing a powerful ballad that creates an impenetrable barrier around you and your allies. For the duration of the spell (up to 1 minute), you and any creatures within range gain a +5 bonus to AC, and any creature that attempts to move into or out of the barrier must make a Strength check with a DC equal to your spell save DC. If it fails the check, the creature is unable to move through the barrier.