B♯ Lydian — Quartal voicings
Three-note stacks of fourths, one per scale degree — the open, ambiguous voicing-flavour McCoy Tyner and Bill Evans built modal-era jazz around (the 'So What' chord).
All 7 quartal voicings in sequence
Degree 1 · Degree 1B♯·E𝄪·A𝄪
Degree 2 · II(4)C##(4)
Degree 3 · III(4)D##(4)
Degree 4 · IV(4)E##(4)
Degree 5 · Degree 5F𝄪·B♯·E𝄪
Degree 6 · VI(4)G##(4)
Degree 7 · VII(4)A##(4)