Rhystic Cave | Magic: The Gathering
Formats Rhystic Cave is Legal in
Official Oracle Text for Rhystic Cave
—Alexi, zephyr mage
Official Rulings for Rhystic Cave
10/4/2004 : Each player (starting with the current player and going in turn order) gets the option to pay when this ability resolves.
10/4/2004 : The card's ability has errata so you can't activate the ability during casting of a spell or activating of an ability. This prevents you from getting into a position where someone paying could stop you from having enough mana to pay for the spell. If you want to use it pay for a spell or ability, you need to use this card before you start the casting or activating.