Every September, first year Hogwarts students arrive to Hogsmeade Station on the Hogwarts Express where they are lead the lake shore for their ride across the Black Lake on magic boats.
A giant squid inhabits the Black Lake. We believe the beasty to be harmless, after all it saved Dennis Creevey after he fell into the lake (likely trying to snap a picture of Hogwarts - relatable).
2 ounces acai blueberry vodka
1.5 ounces tart cherry juice
0.5 ounces orange juice
2 ounces berry seltzer
1 egg white
Add vodka, cherry juice, orange juice, egg white, pearl dust and activated charcoal to a shaker. Shake vigorously, stir in seltzer (to taste) and enjoy!