In a medium saucepan heat sugar and water for about 5 minutes until all the sugar is dissolved and it becomes a syrup consistency. Set aside to cool slightly.
Juice blood oranges and lemons in separate measuring cups. In a pitcher, add the blood orange juice, lemon juice, water, and simple syrup. If you don't like pulp then just place a sieve over the pitcher and run it through that. Pour over ice and serve with blood orange slices and mint as garnish.
If you want it with a kick, then juice a piece of ginger and add it. Highly recommend.
Stays good in the fridge for 3 days.