Progression
The ii–V–i (minor) in Db minor
ii–V–i (minor) in Db minor plays Ebm7b5, Ab7 and Dbm — iiø, V and i — across 3 chords. The minor-key version of jazz's core cadence: a half-diminished ii, a dominant V that borrows the raised seventh, and a minor tonic.
The chords, in order
1Ebm7b5iiø
2Ab7V
3Dbmi