Enters abilities are great on high-cost creatures because they give you at least some bang for your mana investment
Commander decks are always packed with mana rocks, and what better way to take advantage than nabbing them from your opponents whenever they tap them for mana
This card becomes playable (and strong!) through its Plot ability, which allows you to play it without paying its cost on a later turn when you've already slung some other spells
Thankfully, even if we ignore the Bird support elements of Traveling Chocobo, this card is still fantastic
In other words, the entire metagame of Magic: The Gathering's Standard format is in flux as players attempt to figure out which decks will rise to the top and which will fall by the wayside
Terras mechanics reference the World of Ruin section of Final Fantasy 6, as she can Mill cards, and when she damages players, her owner can pay two to summon a 3 cost or less creature from the graveyard, emulating the party reforming in its second act