Thunderous Calamity

Several immense waves of thunderous force explode out from you. Each creature in a 90ft cube originating from you makes a Constitution save, taking 10d8 thunder damage, is deafened for 10 minutes, and is pushed 60ft away from you. On a success, the creature takes half damage, is deafened only for 1 minute, and is pushed 30ft away.

Unsecured objects within the AoE are pushed 60ft away automatically, and the spell emits a boom audible out to 1 mile.

At Higher Levels. When you cast the spell using a 9th slot, the cube's size becomes 120ft, and creatures that fail the save and objects are pushed 90ft away from you.