Boros Keyrune
c4b65847-fee2-4e00-b598-7363059ec3ff
$0.50 CND
{T}: Add {R} or {W} to your mana pool.
{R}{W}: Boros Keyrune 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.)