Incubation Druid

{t}: Add one mana of any type that
a land you control could produce.
If Incubation Druid has a +1/+1
counter on it, add three mana of that
type instead.
{3}{g}{g}: Adapt 3. (If this creature has no
+1/+1 counters on it, put three +1/+1
counters on it.)