The rock world's favorite borrowed chord is a doorway wearing a disguise: hear the b7 major as the subdominant of the key a fourth above and walk through plagally. No dominant required — the same chord that colored the old key furnishes the new one.
hear it in jam-band section changes · modal rock bridges
Lead-in — how players set it upVamp 1 and b7 first so the gate chord feels like furniture.Or arrive at the gate from 5 — dominant energy, plagal exit.Or double-gate: b7 of the NEW key appears next — chains down.Follow — where it usually goesWalk in plagally and confirm with the new 5.Confirm with the new key's own borrowed b7 — same wallpaper.Or walk home later — old 1 is the new 5, one cadence away.
Over the gate b7, sing the note it shares with both keys — the old b7 IS the new 4; hold it through the door.Target tones (in C)C — lean on E (3)Bb — lean on D (3)F — lean on A (3)Half-step wiresE → F · Bb ↘ AAcross the borderhold these into F: C