Hammering Blows

Once per turn, make an attack roll. If the attack succeeds, make another attack roll at -1 to hit. If that attack succeeds, make another attack roll at -2 to hit. Continue making attack rolls, with a cumulative -1 to each roll, until one misses. The final successful attack deals an extra 1D6 force damage per (level divided by 2), rounded down (minimum 1D6). You regain use of this feat after a short or long rest.