Gargar, Land Ravager

This spell costs {1} less to cast for each land card in your graveyard.

Whenever Gargar enters or attacks, you may sacrifice a land. When you do, each opponent may discard a land card. Draw a card for each opponent who doesn’t.

{r},Discard a land card: Gargar deals 3 damage to any target
{r}{g},Discard a land card: Destroy target artifact or enchantment.