Cannara, the Red Veil

Substantiate —Whenever Cannara, the Red Veil becomes tapped, if it's not attacking, during your next turn, if a source you control would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.
{6}{u}{u}{u}, {t}, Discard a card: Take an extra turn after this one. Put six +1/+1 counters on target land you control and it becomes a 0/0 Elemental creature with haste. It's still a land.