The fourth installment of the Blood Oath ultra-premium bourbon series – Pact No. 4 – has launched. The Blood Oath series combines rare bourbons, blended and bottled by hand. Pact No. 4 continues the tradition with a union of three Kentucky straight bourbons: an extra-aged 12-year provides a mellow finish with oak under-tones; a 10-year adds caramel and honey notes; and a 9-year finished in toasted barrels adds chocolate, vanilla and spice flavors. Sold in a commemorative stained wooden box. 98.6 proof.