Ghor-Clan Berserker

Chieftain - As long as Ghor-Clan Berserker is the creature with the greatest power among creatures you control, opponents can't cast spell during your turn.
Ghor-Clan Berserker costs {1} less to cast for each land in opponent's graveyard.
{1}{g} : Ghor-Clan Berserker gains +1/+1 until
end of turn.