Grolgar, Natures Voice

Trample, Indestructible
cannot attack unless you control the most lands
Golgar, Natures voice costs 1 less to cast for every
land you control, this also reduces the amount of
colored mana it cannot reduce the mana cost
under 4 mana
{t}{10}{10}{10}{10} Reduce this cost by 1 for every
land on the battlefield, Grolgar deals 1 damage to
every opponent for every land in all graveyards
and on the battlefield it cannot reduce your
opponents life total under 5 life