Boros Keyrune
Artifact
Mana Cost:
{3}
CMC 3
Set:
GRN Guild Kit (GK1)
Rarity:
Uncommon
Standard
Commander
{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.)
Deck Archetypes
Ramp
Equipment
It provides mana and can become a creature with double strike, making it a ramp and equipment tool with combat utility.