Crossword puzzle clue "makes things interesting in a way"

Makes things interesting, in a way

Makes things more interesting

Up the ___ (make things more interesting, in a way)

Makes a hand more interesting

Make things more interesting, so to speak

Make more interesting, in a way

A French military strategist described it in 1918 as "an interesting toy" but "with no military value"

Music genre that "must be as ignorable as it is interesting," per Brian Eno