When Katara comes into play you get to make a 1/1 Ally creature token, though thats only the start
Like most Magic: The Gathering cards, the value of Traverse the Ulvenwald depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Innistrad Remastered)
Also, it adds more to the flavor of this set by sacrificing it at the end of the third turn Final Fantasy summons only stick around for a short time as temporary back-up
Which is another reason why it is so collectable
The first time this is done on a given account, a message will be delivered to the player's inbox with an attached Cabbage companion gift
(Artifacts, legendaries, and Sagas are historic.) Exile any number of historic cards from your graveyard with total mana value 30 or greater: You get an emblem with "Creatures you control have base power and toughness 9/9." The Capitoline Triad's mana value doesn't change no matter how many historic cards are in your graveyard