Cavern of Souls (0410e) (Borderless) [The Lost Caverns of Ixalan] Niko that land doesn't untap during

that land doesn't untap during its controller's next untap step

Whenever you cast an instant or sorcery spell with the chosen name

When Grisly Transformation enters the battlefield

Sacrifice Escape Tunnel: Target creature with power 2 or less can't be blocked this turn

Remove an oil counter from Atmosphere Surgeon: Target creature gains flying until end of turn

Cavern of Souls (0410e) (Borderless) [The Lost Caverns of Ixalan] Niko that land doesn't untap duringSet: The Lost Caverns of Ixalan Type: Land Rarity: Mythic As Cavern of Souls enters the battlefield, 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.