Rulings

• 2018-01-19
  The ability of Sanctum of the Sun is a mana ability. It doesn't use the stack and can't be responded to.
• 2018-01-19
  If an object has no mana cost, its converted mana cost is 0. A converted mana cost of 0 can still help unlock Azor’s Gateway.
• 2018-01-19
  If a card in exile has in its mana cost, X is considered to be 0.
• 2018-01-19
  The converted mana cost of a split card, such as a card with aftermath from the Amonkhet block, is based on the combined mana cost of its two halves. A split card doesn’t have two converted mana costs.
• 2018-01-19
  The cards you exile from your hand are exiled face up.
• 2018-01-19
  For more information on double-faced cards, see the Ixalan mechanics article (http://magic.wizards.com/en/articles/archive/feature/ixalan-mechanics).
• 2018-01-19
  The ability of Sanctum of the Sun is a mana ability. It doesn’t use the stack and can’t be responded to.