Serra Avenger

• WOTC Official Reminder Textofficial rules
  Vigilance — Attacking doesn't cause this creature to tap.

• WWizards of the Coast2006-09-25
  Official Ruling
  You can cast Serra Avenger during another player's first, second, or third turns of the game if some other effect (such as Vedalken Orrery) enables that.
• WWizards of the Coast2012-07-01
  Official Ruling
  If the game is restarted (by Karn Liberated), you can't cast Serra Avenger in your first, second, or third turn in the new game.
• WWizards of the Coast2012-07-01
  Official Ruling
  Serra Avenger cares about how many turns you have taken, not necessarily how many turns the game has had, in case you take an extra turn.

Rulings via Scryfall