Creatures your opponents control get -1/-0 until end of turn if was spent to cast this spell, and creatures you control get +1/+0 until end of turn if was spent to cast this spell. (Do both if was spent.)

Instant –

From the Magic The Gathering set Eventide

Magic The Gathering Unnerving Assault - Eventide Single Card Prices

Comparing several retailers of Magic The Gathering single cards we have found that this Uncommon card from Eventide is worth around £0.20 - £0.48, though that depends on condition, if is a foil or borderless art and if there are other cards from other series called Unnerving Assault. Though we are doing all we can to present correct data please check with the retailer for final availability, price and any shipping costs.

Other Purchase Options:

Magic: The Gathering Eventide Booster Pack

Eventide Bundle Boxes (prev Fat Packs)

Eventide Booster Boxes