Thunderoot

Trample
Other plants you control get +1/+2
Every time you tap 3 of any basic land card, put a
1/1 plant creature token into play under your
control.
"It has spines like the teeth of a dragon, each tipped
with venom. But it is as full of life as any ordinary
organism, in fact it creates life and plants it's seeds in
the ground everywhere it walks." -Forest Study Guide