All Forests and all Saprolings are 1/1 green Saproling creatures and Forest lands in addition to their other types. (They're affected by summoning sickness.)
"It was a sight of pain and awe—a twisted forest, migrating across the salt plain in search of richer soil."
—Edahlis, greenseeker
(19/03/2021)
Each Forest and Saproling will have the card types creature and land, and the subtypes Forest and Saproling. Each subtype maintains its correlation to the proper type: Forest isn't a creature type and Saproling isn't a land type.
(19/03/2021)
Each Forest has the ability ": Add ."
(19/03/2021)
Forests enter the battlefield as land creatures, and abilities that trigger whenever a creature enters the battlefield will trigger. Because you haven't controlled these creatures since your turn began, you can't pay the cost of their mana ability.
(19/03/2021)
Saprolings enter the battlefield as land creatures, and abilities that trigger whenever a land enters the battlefield will trigger.
