Once in play, Cavern of Souls can be tapped for one mana of any color, but there's a catch. This mana can only be used to cast creature spells of a specific type that you choose when casting the land.

Cavern of Souls (Borderless) - $29. Magic the Gathering. This desirable card is considered one of the best in this set so it’s no surprise to see it at the top of the price list as well.

Cavern of Souls. Magic: The Gathering. This card enables you to cast spells without being countered. This is a unique ability in the Magic card game so it’s often a very pricey card.