Cloud, Tidus, Terra, and Y'shtola will each lead their own 100-card precon decks, as designers for the set sought to focus on fan favorites while also prioritizing characters that most flavorfully integrate Magic: The Gathering mechanics
The token copies exactly what was printed on the original card and nothing else, except the characteristics specifically modified by eternalize
The whole treatment is pretty similar to Magic: The Gatherings full art cards that appear in their more expensive Collector boosters and rarely in other sealed products
In a Two-Headed Giant game, life gained by your teammate won't cause Aerith Gainsborough's second ability to trigger, even though it caused your team's life total to increase
While transformed, it even gains an activated ability that allows it to cause a wolf or werewolf to fight target creature for the cost of four mana, not just adding tokens to the battlefield, but fight-based removal as well
Tergrid's Lantern in EDH is very powerful if you need a mana sink, and it gets ridiculous with cards like Nykthos, Shrine to Nyx or Cabal Coffers