Awesome Primordial

Trample, haste
Whenever a land creature you control dies, create a 4/4 green Elemental creature token with trample and haste.
Landfall - Whenever a land enters the battlefield under your control, you may put four +1/+1 counters on it. If you do, it becomes a 0/0 Elemental creature with trample and haste that's still a land.