Magic: The Gathering Comprehensive Rules Changes - Core Set - Ninth Edition to Ravnica: City of Guilds

Old rule (Core Set - Ninth Edition)	New rule (Ravnica: City of Guilds)
104.3. [Click to view all changes.]
104.3. The mana symbols are {W}, {U}, {B}, {R}, {G}, {X}, {Y}, {Z} and the numerals {0}, {1}, {2}, {3}, {4}, and so on.	104.3. The mana symbols are {W}, {U}, {B}, {R}, {G}, {X}, {Y}, {Z}, the numerals {0}, {1}, {2}, {3}, {4}, and so on, and the half-half symbols {W/U}, {W/B}, {U/B}, {U/R}, {B/R}, {B/G}, {R/G}, {R/W}, {G/W}, and {G/U}.

Old rule (Core Set - Ninth Edition)

New rule (Ravnica: City of Guilds)

104.3.

The mana symbols are {W}, {U}, {B}, {R}, {G}, {X}, {Y}, {Z} and the numerals {0}, {1}, {2}, {3}, {4}, and so on.

104.3.

The mana symbols are {W}, {U}, {B}, {R}, {G}, {X}, {Y}, {Z}, the numerals {0}, {1}, {2}, {3}, {4}, and so on, and the half-half symbols {W/U}, {W/B}, {U/B}, {U/R}, {B/R}, {B/G}, {R/G}, {R/W}, {G/W}, and {G/U}.