The Autumn Everwood

(The Autumn Everwood enters the battlefield
tapped.)
{t}: Add {r} or {g}.
Whenever you tap The Autumn Everwood for
mana, create a 1/1 green Saproling creature
token with "When this creature dies, scry 1."
At the beginning of your upkeep, if there are
four or more Saproling tokens on the battlefield,
transform The Autumn Everwood.