![Mana Leak [Mystery Booster]](https://cdn.shopify.com/s/files/1/0451/3388/9694/files/00307f74-db99-57cc-b2a8-48bf26e09c8e.jpg?v=1768427447)
Mana Leak [Mystery Booster]
| Set: | Mystery Booster |
| Type: | Instant |
| Rarity: | Common |
| Cost: | 1U |
| Colors: | U |
Counter target spell unless its controller pays {3}.
The fatal flaw in every plan is the assumption that you know more than your enemy.