Rewarded after completing wave 26-50 in the Crucible.
|“|| The Abyssal Boots are a portion of the four horsemen's ultimate war-gear. The Rider wearing these armored footwear is prepared for any challenge. Few dare to face a Horseman clad in his Abyssal armor, for it is ritually prepared towards the destruction of all enemies. The boots improve every aspect of it wearer's ability in battle, and when combined with the other pieces, the set produces even more powerful effects.|
— In-Game Description, Darksiders II