Song of Genesis

When Song of Genesis enters the battlefield,
Target creature or artifact gets a forest counter
(each permanent with a forest counter is
now a basic forest). At the beginning of your
end step, a creature or artifact gets a forest
counter. As long as there are 3 or more forest
counters on permanents, Song of Genesis is
a 9/9 Dryad Beast creature with trample.
If Song of Genesis is destroyed, remove all
forest counters from permanents