Demeter, Goddess of Plants

Indestructible, Trample, Vigilance
Demeter, Goddess of Plants' power and toughness are equal to the number of untapped green mana you control.
Landfall - Whenever a land enters the battlefield under your control, put a 2/1 Green Plant onto the battlefield.
{t}{g}{g}{g}{x}: Put X +1/+1 counters on all creatures you control.