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Unnerving Assault [Eventide]
| Set: | Eventide |
| Type: | Instant |
| Rarity: | Uncommon |
| Cost: | 2U/R |
| Colors: | RU |
Creatures your opponents control get -1/-0 until end of turn if {U} was spent to cast this spell, and creatures you control get +1/+0 until end of turn if {R} was spent to cast this spell. (Do both if {U}{R} was spent.)
The scales of battle rarely balance.