Forbidden Magic?

If X is 3 or more it has Casualty 3 & Dazzle.
Each player may play any card with a mana
value of X or less from their hand to play.
For each that does, you may draw a card.
(Playing them in this order; Creature, Artifact, Enchantment, Plainswalker, Instant, Sorcery)

{x}{p/u}{p/u} Flashback