Bastion, Nature's Orphan

Whenever a land enters the battlefield under
your control, put a charge counter on Bastion
and tap it. Bastion does not untap during your next untap step, and cannot gain charge counters during your next turn.
{g}{g}{g},{t}: Remove at least six charge counters from Bastion, then untap up to that many tapped lands you control. Destroy all nonland permanents except Bastion.