Name:Vex
ManaCost:2 U
Types:Instant
A:SP$ Counter | Cost$ 2 U | TargetType$ Spell | TgtPrompt$ Select target spell | ValidTgts$ Card | SubAbility$ DBDraw | SpellDescription$ Counter target spell. That spell's controller may draw a card.
SVar:DBDraw:DB$Draw | Defined$ TargetedController | NumCards$ 1 | OptionalDecider$ TargetedController
#believe it or not, the OptionalDecider thing works. I wouldn't have believed it if I wouldn't have tested it myself.
SVar:Picture:http://www.wizards.com/global/images/magic/general/vex.jpg
Oracle:Counter target spell. That spell's controller may draw a card.