Bane of Lake Gitrog

Sacrifice a land: Bane of Lake Gitrog gains protection from all colors the sacrificed land could produce mana of until end of turn.
If this card is in a graveyard, during your upkeep, you may exile a land card from your graveyard, then create a 1/1 green and black Frog creature token with "Discard a land card: Regenerate this creature."
"I traded him to a sorcerer for a love spell. I wonder if he knows how much I regret d