| Rarity: | C |
| #: | 246 |
| Creature Type or Sub Type: | Artifact |
| Rules Text Contains: | T: Add R or W to your mana pool.
RW, T, Sacrifice Boros Cluestone: Draw a card. |
| Flavor: | "In case of fire, treachery, citywide riot, political upheaval, or worldwide societal collapse, break glass." —Cluestone inscription |
| Set: | Commander 2015 |
| Number: | 246 |
