Cards List
R 0165 – XLN
Enchantment
Standard
Pioneer
Alchemy
Historic
Timeless
Historic Brawl
Rare
- If a revealed card in your library has {X} in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.
- For spells with {X} in their mana costs, use the value chosen for X to determine the spell's mana value.
- If the spell's mana value is 0, you do nothing as the ability of Sunbird's Invocation resolves.