Chord sequence
Bm7 G♯m7♭5 C♯m7♭5 C7♯11
In every key
Four-note rootless voicings in their two forms, with the 3rd or the 7th on the bottom, played over the root.
Heard in B minor
Over Bm7 · i7
Mode 2 of Major
Over G#m7b5 · viø7
Mode 7 of Major
Over C#m7b5 · iiø7
Over C7#11 · subV7♯11
Mode 4 of Melodic Minor