Sleep

Sorcery    (CMC: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

074 M19 • ENChris Rahn

™ & © 1993— Wizards of the Coast

Notes: TODO: Update Copyright

Legal in: Pioneer,Modern,Legacy,Vintage,Commander

Oracle Text (click to copy):

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
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.