Unnerving Assault
Unnerving Assault EVE
Eventide Uncommon 
Cost: Mana 2Mana UR
CMC: 3
Card Type: Instant
Oracle Text: Creatures your opponents control get -1/-0 until end of turn if Mana U was spent to cast Unnerving Assault, and creatures you control get +1/+0 until end of turn if Mana R was spent to cast it. (Do both if Mana UMana R was spent.)
Flavor Text: The scales of battle rarely balance.

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