Dimir Keyrune | Artifact |  | {T}: Add {U} or {B}.
{U}{B}: Dimir Keyrune becomes a 2/2 blue and black Horror artifact creature until end of turn and can't be blocked this turn. | Daniel Ljunggren
                
                        
                    Orzhov Keyrune | Artifact |  | {T}: Add {W} or {B}.
{W}{B}: Orzhov Keyrune becomes a 1/4 white and black Thrull artifact creature with lifelink until end of turn. | Daniel Ljunggren