Whenever you cast an instant or sorcery spell, you may sacrifice another creature with the same converted mana cost as that spell. If you do, copy it. You may choose new targets for the copy.
When Veigar enters the battlefield, you may sacrifice another creature. If you do, you may cast an instant or sorcery with the same converted mana cost as the sacrificed creature.
"My every victory symbolizes the crumbling of justice!"