Mishra's Factory [Fourth Edition (Foreign Black Border)] Azra Assassin one must bring a riddle

one must bring a riddle she has not heard

If each of those creatures could block all creatures that the other is blocking

Set: Magic 2013 Type: Artifact Rarity: Uncommon Cost: {4} {4}

the player can activate mana abilities only if they're from lands that player controls and only if mana they produce is spent to activate other mana abilities of lands the player controls and/or to play that card

Set: Summer Magic / Edgar Type: Basic Land — Forest Rarity: Common ({T}: Add {G}

Mishra's Factory [Fourth Edition (Foreign Black Border)] Azra Assassin one must bring a riddleSet: Fourth Edition (Foreign Black Border) Type: Land Rarity: Uncommon {T}: Add {C}. {1}: Mishra's Factory becomes a 2 2 Assembly Worker artifact creature until end of turn. It's still a land. {T}: Target Assembly Worker creature gets +1 +1 until end of turn.