Underworld is tasty strong cocktail at 1.3 standard drinks. Built with 30ml ouzo olympus and 30ml blackberry liqueur mad rooster with 30ml soda water as well as 100ml ice and best served with farinaceous starchy dishes. Just add ice to glass then pour in ouzo and add soda water. Flaot black berry liqueur on top and served in a old fashioned glass cold.