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Cavern of Souls

Card Name

Cavern of Souls

Type

Land

Rarity

Mythic Rare

rules Text

As Paths of the Dead enters the battlefield, choose a creature type.: Add .: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.

Legal Formats

Alchemy, Brawl, Commander, Explorer, Historic, Legacy, Modern, Pioneer, Standard, Vintage

Not Legal Formats

Pauper

Rulings

(12/7/2018)
You must choose an existing creature type, such as Human or Warrior. Card types such as artifact can't be chosen.
(12/7/2018)
The spell can't be countered if the mana produced by Cavern of Souls is spent to cover any cost of the spell, even an additional cost such as a kicker cost. This is true even if you use the mana to pay an additional cost while casting a spell "without paying its mana cost."
(11/10/2023)
You must choose an existing creature type, such as Human or Warrior. Card types such as artifact can't be chosen.
(11/10/2023)
The spell can't be countered if the mana produced by Cavern of Souls is spent to cover any cost of the spell, even an additional cost such as a kicker cost. This is true even if you use the mana to pay an additional cost while casting a spell "without paying its mana cost."