Rules glossary
↑ Parent rule: 107.4 The mana symbols are {W}, {U}, {B}, {R}, {G}, and {C}; the n…
107.4b Numerical symbols (such as {1}) and variable symbols (such as {X}) represent generic mana in costs. Generic mana in costs can be paid with any type of mana. For more information about {X}, see rule 107.3.
No sub-rules.