Enchanted Moss

{t} Put a moss counter on target land. It becomes
a 2/2 green Treefolk creature. It is still a land.
{g}{g} Take Root (This Treefolk loses half its
power, doubles its toughness and gains reach,
defender, and the ability to block creatures with
forestwalk.)
{g}{g} Uproot (This Treefolk loses all effects from
Take Root and gains trample until end of turn.)
"If you see this moss then you are standing
in the middle of an army. Run."-Tim