Unnerving Assault
109eccfd-19d0-48cc-8b27-9027e4911fee
$0.50 CND
Creatures your opponents control get -1/-0 until end of turn if {U} was spent to cast Unnerving Assault, and creatures you control get +1/+0 until end of turn if {R} was spent to cast it. (Do both if {U}{R} was spent.)