Oracle en-Vec

Creature - Human Wizard 1/1, 1W (2)
{T}: Target opponent chooses any number of creatures he or she controls. During that player's next turn, the chosen creatures attack if able, and other creatures can't attack. At the beginning of that turn's end step, destroy each of the chosen creatures that didn't attack. Activate this ability only during your turn.¹
Illus. Dan Frazier

Gatherer Card Rulings [Nov 2009]

• 10/4/2004: The way the card works is that the target player chooses which creatures will attack on their next turn. Creatures which are chosen to attack, but do not attack, are destroyed at the end of that turn. Creatures which are not chosen to be attackers are not affected in any way other than being unable to attack.

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard, MTGO Classic
Printings (1/6)	Tempest (Rare)