Sha, Mist of the Meadow

Trample, vigilance
{6}{g}{w}: Monstrosity 4. This ability costs {1} less
to activate for each land you control. (If this
creature isnt monstrous, put four 1+/+1 counters
on it and it becomes monstrous.)
Whenever Sha, Mist of the Meadow becomes monstrous, creatures you control gain vigilance
and indestructible until end of turn.