Lands target player controls don't untap during their next untap step.
Legalities
Not Legal
Standardbrawl
Brawl
Penny
Future
Modern
Pauper
Alchemy
Pioneer
Historic
Standard
Gladiator
Oldschool
Historicbrawl
Paupercommander
Explorer
Timeless
Legal
Duel
Legacy
Vintage
Commander
Premodern
Predh
Oathbreaker
Rulings
2008-08-01
No land controlled by the player will untap during their next untap step. This includes lands which entered the battlefield after Mana Vapors resolved.