Boros Keyrune

three generic mana Artifact

tap this permanent : Add one red mana or one white mana .

one red mana one white mana : This artifact becomes a 1/1 red and white Soldier artifact creature with double strike until end of turn. (It deals both first-strike and regular combat damage.)

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0.22 $

Foil 0.60 $

17 printings · up to 0.27 $

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Boros Keyrune rulings

2013-04-15
Until the ability that turns the Keyrune into a creature resolves, the Keyrune is colorless.
2013-04-15
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.