The next time you make a weapon attack during the spell’s duration, a thunderous boom is audible out to 600 feet emanating from the weapon/ammunition used and the attack deals an extra 7d6 Thunder damage on a hit. If a creature is hit, it must succeed on a Strength saving throw or be pushed 15 feet away and is knocked prone. The spell’s magic ends after the attack hits or misses.

At Higher Levels. If you cast this spell using a spell slot of 4th level or higher, the Thunder damage increases by 2d6 for each slot level above 3rd (to a maximum of 11d6).