Immense Elk

Trample
{t}: Add {w}{w}{w}{g}{g}{g} to your mana pool -OR-
You gain 6 life.
{t}, {8}{g/w}{g/w}{g/w}{g/w}: You gain 4 life -AND- All
creatures you control gain +6/+6 and Vigilance
until you choose to untap Immense Elk.