{T}: Add {R} or {W}.
{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.)
Near Mint - $0.50
Near Mint Non-English - $0.50
Lightly Played - $0.47
Lightly Played Non-English - $0.47
Moderately Played - $0.40
Moderately Played Non-English - $0.40
Heavily Played - $0.30
Heavily Played Non-English - $0.30
Damaged - $0.25
Damaged Non-English - $0.25