Auron, Venerated Guardian

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

• WWizards of the Coast2025-06-06
  Official Ruling
  If a token is exiled this way, it will cease to exist and won't return to the battlefield.
• WWizards of the Coast2025-06-06
  Official Ruling
  Once a creature is exiled by the reflexive triggered ability, it doesn't matter what happens to Auron's power. Reducing Auron's power below the exiled creature's power won't cause the exiled creature to return to the battlefield.
• WWizards of the Coast2025-06-06
  Official Ruling
  Auras attached to the exiled creature will be put into their owners' graveyards. Any Equipment will become unattached and remain on the battlefield. Any counters on the exiled creature will cease to exist. When the card returns to the battlefield, it will be a new object with no connection to the card that was exiled.
• WWizards of the Coast2025-06-06
  Official Ruling
  You don't choose a target for Auron's last ability at the time it triggers. Rather, a second "reflexive" ability triggers when you put a +1/+1 counter on it this way. You choose a target for that ability as it goes on the stack. Each player may respond to this triggered ability as normal.

Rulings via Scryfall