
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.)
Unnerving Assault has 1 printing, first in Eventide (2008). EDHREC ranks it #31,850 among Commander cards. It has 5 official rulings.
Cards that show up in the same decks on EDHREC.