You could play it and use it to block after your opponent entered battle but before you present a different blocker. It was decent against FBtN Heroes like The Strong Angel since it just had large toughness and could stalemate it. Being a symbolic genderless character, it would also be harder to target with something like A New Creation or Striking Herod, which require humans or males, respectively. It would also be used sometimes in multiplayer since you could place it in an opponent's territory if they didn't have another blocker against another opponent (sort of like The Darkness). But yeah, like Watchman said, the new Doubt does all that and more aside from possibly helping an opponent block another opponent.