Toast 4 cinnamon sticks, 2 star anise, 10 whole cloves, 10 allspice berries, and 1 whole nutmeg in a large pot over medium heat for 2-3 minutes, until fragrant.
Reduce the heat to low and add ½ gallon of apple cider. Warm for 1 hour without letting it simmer, then ladle into mugs.