Lands target player controls don't untap during their next untap step.
Legalities
Not Legal
Alchemy
Brawl
Explorer
Future
Gladiator
Historic
Modern
Oldschool
Pauper
Paupercommander
Penny
Pioneer
Standard
Standardbrawl
Timeless
Legal
Commander
Duel
Legacy
Oathbreaker
Predh
Premodern
Vintage
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.