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.
|Maj7#5||Lydian Augmented (from the root of chord)|
Lydian Augmented (from the root of chord)
|Augmented Triad (+)||Lydian Augmented (from the root of chord)|