Valda's Spire of Secrets
Arcane Anomaly
1-level Abjuration
Casting Time: 1 action
Range/Area: Self (30-foot radius)
Components: V, S, M
Materials: a broken mirror
Duration: Concentration, up to 1 minute
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.