Undercity Sewers (Borderless) (20) (PZA)
Non-Foil - NM
Not Buying
![Counterbalance [Secret Lair Drop Series]](/images/no-image-placeholder.svg)
Counterbalance [Secret Lair Drop Series]
| Set: | Secret Lair Drop Series |
| Type: | Enchantment |
| Rarity: | Rare |
| Cost: | UU |
| Colors: | U |
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.