Beasts of the Plains

Trample
Cultivate 5 ( You may exile Beasts of the Plains attached to target land with no cultivate counters on it, then put 5 cultivation counters on that land. Whenever that land taps for mana, you may remove 1 cultivation counter from it. When the last is removed, you may cast this card without paying its mana cost.)
The once extinct sound of thundering hooves is now returning.