| Rarity: | U |
| #: | 157 |
| Creature Type or Sub Type: | Enchantment |
| Rules Text Contains: | Whenever an opponent casts a spell, you may reveal the top card of your library. If you do, counter that spell if it has the same mana value as the revealed card. |
| Set: | Mystery Booster 2 |
| Number: | 157 |
