Springs of Plenty

{t}Add {g/w}{g/w}{g/w}
Graft 20 (This land enters the battlefield with 20
+1/+1 counters on it. Whenever a creature enters
the battlefield, you may move any number of
+1/+1 counters from this land to that creature.)
Whenever you move a +1/+1 counter from
Springs of Plenty to a creature, that creature gains trample.
When Springs of Plenty has no more +1/+1
counters on it, exile it, and target creature gets
+20/+20 and gains trample.