Arcane Anomaly

1st-level abjuration
Casting time: 1 action
Range: Self (30-foot-radius)
Target: --
Components: V, S, M (a broken mirror)
Duration: Concentration, up to 1 minute
Classes:
Subclasses:

You spread cracks in the magical energy that suffuses the multiverse. For the duration, whenever a spell is cast within range, roll a d6. On a 1, the spell casting fails, expending a spell slot as normal, but not consuming expensive material components.