flavorText: The Rakdos use it for everything you can think of and plenty more than that.
name: Rakdos Keyrune
originalText: {T}: Add {B} or {R}.
  {B}{R}: Rakdos Keyrune becomes a 3/1 black and red Devil artifact creature with first strike until end of turn.
printings: GK2, RTR
text: {T}: Add {B} or {R}.
  {B}{R}: This artifact becomes a 3/1 black and red Devil artifact creature with first strike until end of turn.
type: Artifact