Nadu, Winged Wisdom

• WWizards of the Coast2024-06-07
  Official Ruling
  Nadu, Winged Wisdom's last ability grants a triggered ability to itself as well as other creatures you control.
• WWizards of the Coast2024-06-07
  Official Ruling
  If Nadu leaves the battlefield and returns to the battlefield in the same turn, or if Nadu leaves and another Nadu appears, the triggered ability granted by the new one is different than the triggered ability granted by the old one. The one granted by the new Nadu may trigger twice for each creature you control, even if the ability granted by the old Nadu already triggered twice for those creatures that turn. (Note that creatures you control won't have the ability granted by the old one anymore, and if you control multiple Nadus, you won't have the opportunity to take actions before the "legend rule" gets you down to one Nadu.)
• WWizards of the Coast2024-06-07
  Official Ruling
  If you somehow control more than one Nadu, each permanent you control will have that many instances of the granted ability. These abilities are not redundant. For example, if you control two Nadus and one becomes the target of a spell or ability, each of its granted abilities will trigger. If that same Nadu becomes the target of a spell or ability again later in the turn, each of its granted abilities will trigger again, as each of them have triggered only once so far this turn.
• WWizards of the Coast2024-06-07
  Official Ruling
  The ability that Nadu grants to each creature you control functions independently for each creature. Specifically, the ability can trigger twice each turn for each creature you control, not just twice total.
• WWizards of the Coast2024-06-07
  Official Ruling
  If Nadu somehow enters the battlefield while a spell or ability that targets a creature you control is on the stack, the ability granted by Nadu won't trigger since that creature didn't have that ability when it became the target of that spell or ability.
• WWizards of the Coast2024-06-07
  Official Ruling
  If Nadu leaves the battlefield while one or more triggered abilities generated by the ability it grants are still on the stack, those abilities will still resolve as normal.

Rulings via Scryfall

• WO
  Wizards of the Coast2025-11-10

  Nadu, Winged Wisdom was banned in legacy on November 10, 2025. On the other side of the predictability spectrum is Nadu, Winged Wisdom. This one is a bit more straightforward: it's a power-level outlier that's flown under the radar. This mix of the deck's power level, difficulty to attack, and undesirable play patterns has us acting against Nadu a bit more aggressively than we normally prefer to act against cards in Legacy, but we believe it is in the best interest of Legacy's health. Source: https://magic.wizards.com/en/news/announcements/banned-and-restricted-november-10-2025
• WO
  Wizards of the Coast2024-09-23

  Nadu, Winged Wisdom was banned in commander on September 23, 2024. Given that Nadu, Winged Wisdom has been ejected from multiple formats at this point, it's no surprise that we took a close look at it for Commander. Part of the problem is the way in which Nadu wins, where it takes a really long time to do non-deterministic sequences that can't be shortcut and might eventually fizzle out. It interacts badly with cards that are staples of casual play, most notably Lightning Greaves, meaning that decks it gets thrown into without abuse intent can still create a situation where the player is monopolizing all the time in the game. Source: https://magic.wizards.com/en/news/announcements/commander-banned-and-restricted-announcement-september-23-2024
• WO
  Wizards of the Coast2024-08-26

  Nadu, Winged Wisdom was banned in modern on August 26, 2024. Players knew we were likely to ban Nadu on the next opportunity, but they also knew that the best chance to win an event was likely by playing with Nadu. It was a poor experience for players, stores, and tournament organizers. Source: https://magic.wizards.com/en/news/announcements/august-26-2024-banned-and-restricted-announcement