Boros Keyrune - Gatecrash - 227

Artifact

Mana Cost: {3}

{T}: Add {R} or {W}.
{R}{W}: 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.)

Uncommon · Gatecrash · #227 (GTC)

Illustrated by Daniel Ljunggren