Look on your minimap for the small red dot to know where the Blackhorn spawned. Seek him out and kill him. He is an Elite, so be careful. Afterward, pick up the Head of Blackhorn.
Diablo 4 Gold, Items, Boosting
Diablo 4 Items for Sale (6% off coupon: vhpg). Fast and Safe Diablo IV Items. 5-star service, nice discount, instant delivery.