Preheat your oven to 250°F and set out a large roasting pan or baking sheet with high sides.
In a large bowl, mix together all cereals, nuts, pretzels, and bagel chips.
In a separate bowl, whisk together melted butter, Worcestershire sauce, seasoned salt, garlic powder, and onion powder.
Slowly pour the butter mixture over the cereal mix, stirring gently to evenly coat everything.
Transfer the mix to the roasting pan and bake for 1 hour, stirring every 15 minutes.
Allow the mix to cool completely before serving or storing in an airtight container.