Our next chord is very common in fusion and jazz music and has a very attractive but dark sound. It's called a Major7 #5 chord and is the III chord from the melodic minor scale.
The scale required to play over this chord is a Lydian Augmented scale which, as the name suggests, is a lydian scale with a sharpened 5th. This is the 3rd mode of the melodic minor scale.
Here's the chart with the scale/chord relationships.
| Chord | Scale |
| Maj7#5 | Lydian Augmented (from the root of chord) |
| Maj9#5 |
Lydian Augmented (from the root of chord) |
| Augmented Triad (+) | Lydian Augmented (from the root of chord) |