Rampant Frogantua's second ability counts every player who has lost, no matter how the player lost the game: due to a state-based action (having 0 or less life, trying to draw a card from an empty library, having 10 or more poison counters), because of a spell or effect that states they lose the game, because your awesome might has left them with no choice other than concession, or for any other reason
I can't imagine that it wouldn't continue to go up in price given what we know about the set and the trends we've seen so far
Immerwolf Immerwolf is one of the wolf lords from the original Innistrad
Spend this mana only to cast a creature spell." Whenever you cast a creature spell, if three or more mana from creatures was spent to cast it, draw a card
Remember, it's not just the mono-colored versions of these decks that will be able to take advantage