When Rank and File enters, green creatures get -1/-1 until end of turn.
Legalities
Not Legal
Alchemy
Brawl
Explorer
Future
Gladiator
Historic
Modern
Oldschool
Pauper
Paupercommander
Pioneer
Standard
Standardbrawl
Timeless
Legal
Commander
Duel
Legacy
Oathbreaker
Penny
Predh
Premodern
Vintage
Rulings
2004-10-04
The -1/-1 penalty is given to all green creatures on the battlefield when the triggered ability resolves. It will not apply to green creatures that enter later in the turn.