Cavern of Souls
As this land enters, choose a creature type. {T}: Add {C}. {T}: 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.
Rulings (4)
Dec 7, 2018 · You must choose an existing creature type, such as Human or Warrior. Card types such as artifact can't be chosen.
Dec 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."
Nov 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."
Nov 10, 2023 · You must choose an existing creature type, such as Human or Warrior. Card types such as artifact can't be chosen.
Where it’s played now
Inclusion by archetype
| Archetype | Format | Inclusion | Copies | Decks (n) |
|---|---|---|---|---|
| Eldrazi | Legacy | 100% | 4× | 16 |
| Merfolk | Modern | 100% | 2–4× | 13 |
| Dimir Looting | Standard | 100% | 1–3× | 12 |
| Temur Omniscience | Standard | 100% | 4× | 11 |
| Mono White Stompy | Legacy | 100% | 4× | 8 |
| Temur Elementals | Standard | 100% | 4× | 8 |
| Eldrazi | Vintage | 100% | 4× | 6 |
| Magda, Brazen Outlaw | cEDH | 100% | 1× | 6 |