T: Add R or W to your mana pool.
RW, T, Sacrifice Boros Cluestone: Draw a card.
Rarity: Common
#: 137
Card Type: Artifact
Flavor: "In case of fire, treachery, citywide riot, political upheaval, or worldwide societal collapse, break glass."
—Cluestone inscription
Casting Cost: 3
Artist: Raoul Vitale