Azorius Keyrune
Artifact
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or 
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: This artifact becomes a 2/2 white and blue Bird artifact creature with flying until end of turn.
"The higher the mind soars, the greater its understanding of the law." —Isperia
Daniel Ljunggren
Return to Ravnica (RTR)
• #225Rulings
Activating the ability that turns the Keyrune into a creature while it's already a creature will override any effects that set its power and/or toughness to another number, but effects that modify power and/or toughness without directly setting them will still apply.
(wotc • 2013-04-15)
Until the ability that turns the Keyrune into a creature resolves, the Keyrune is colorless.
(wotc • 2013-04-15)
Rulings
Activating the ability that turns the Keyrune into a creature while it's already a creature will override any effects that set its power and/or toughness to another number, but effects that modify power and/or toughness without directly setting them will still apply.
(wotc • 2013-04-15)
Until the ability that turns the Keyrune into a creature resolves, the Keyrune is colorless.
(wotc • 2013-04-15)