In an airtight container, combine whiskey and chiles.
Seal and let rest for 24 hours. You can do longer if you want to! Just know it’ll be SPICY AF.
In a pitcher, combine chile-infused whiskey, grapefruit, orange, and lime.
Chill for at least 2 to 3 hours.
When ready to serve, top sangria base with beer. Stir to combine and serve.