# Canyon Slough Canyon Slough is a dual land from Amonkhet that produces red or black mana while entering the battlefield untapped. Collectors value it primarily for constructed playability rather than scarcity, as it sees regular use in competitive red-black decks across multiple formats. The card's utility keeps demand steady among players building functional mana bases. Variant availability is straightforward: nonfoil and foil versions exist in roughly equal collector interest. Neither variant commands significant premiums over the other. Condition and centering matter more than rarity designation here, since the card's appeal rests on function rather than collectibility. It remains a practical staple rather than a sought-after treasure.