Cobra's Fang

Combine the overproof rum, falernum, passion fruit syrup, orange juice, and freshly squeezed lime juice in a blender.

Add a dash of bitters and two dashes of absinthe.

Introduce a generous amount of crushed ice to the mix.

Blend the entire mixture briefly until just combined.

Pour the blended cocktail into a chilled cocktail coupe.

Garnish with a pinch of cinnamon for an aromatic finish.