Elder Serpent

As an additional cost to play this card, sacrifice Snake Den, otherwise discard this card and search your library for a card named Snake Den.
Elder Serpent has toughness equal to your amount of forest lands and power equal to the amount of snake tokens killed during this game.
{r/g}{r/g} Give a -1/-1 counter to Elder Serpent and destroy target creature with lower power than Elder Serpent or land card. Summon snake tokens with
power equal to target's.
{x} Untap target spirit card where X is equal