MKM represents a return to the beloved plane of Ravnica, and, as such, the guild leaders of Ravnica (4 rares and 3 mythic rares) each received serialized double rainbow foil treatments in the Ravnica City frame, which gives deep respect to the importance these legendary figures play in Ravnica’s existence. Only 250 copies each of these 7 cards are available only in Collector Boosters and always in English, though they can be found in Collector Boosters of any language.

Niv-Mizzet, Guildpact