Sleep

Sorcery, 2UU (4)
Tap all creatures target player controls. Those creatures don't untap during that player's next untap step.
"I give them dreams so wondrous that they hesitate to return to the world of the conscious."
-Garild, merfolk mage
Illus. Chris Rahn

Gatherer Card Rulings [Nov 2009]

• 10/1/2009: The second part of Sleep's effect affects all creatures the targeted player controls as Sleep resolves, not just the ones that Sleep actually caused to become tapped.
• 10/1/2009: Unlike Wall of Frost, Sleep tracks both the player and the creatures. If one of the creatures controlled by the targeted player as Sleep resolves changes controllers, the creature will untap as normal during its new controller's next untap step.

Format Legality	Legal in Vintage, Legacy, Extended, Standard, MTGO Classic
Printings (1/9)	Magic 2010 (Uncommon)