Artifact, 6 (6)
Rare
Each opponent who controls more creatures than you can't play creature cards. The same is true for artifacts, enchantments, and lands.
Mages dare not attempt magic in its grotesque presence.
Illus. David Martin

8/1/2008: Spelling this out completely: -- Each opponent who controls more creatures than you can't play creature cards. -- Each opponent who controls more artifacts than you can't play artifact cards. -- Each opponent who controls more enchantments than you can't play enchantment cards. -- Each opponent who controls more lands than you can't play land cards.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern