Greensleeves, Maro-Sorcerer

The ability that defines Greensleeves, Maro-Sorcerer's power and toughness works in all zones, not just on the battlefield.

A landfall ability doesn't trigger if a permanent already on the battlefield becomes a land.

A landfall ability triggers whenever a land you control enters for any reason. It triggers whenever you play a land, as well as whenever a spell or ability puts a land onto the battlefield under your control.