Boros Keyrune
Boros Keyrune {3}
Artifact
{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.)
Latest set: [GTC] Gatecrash ( U · #227 )