Blood Oath is a blend of three bourbons to create a Kentucky straight bourbon whiskey. Pact No. 4 combines a 12-year bourbon that provides a mellow finish with deep oak undertones, and a rich 10-year bourbon that adds caramel and honey flavors, the company says. The third bourbon, a nine year old, rounds out the flavors as it is finished in toasted bourbon barrels – adding deep chocolate, vanilla and spice flavors.