Reyav, Master Smith

• WWizards of the Coast2020-11-10
  Official Ruling
  If a creature you control that's enchanted and equipped attacks, Reyav's ability will trigger only once for that creature. (Don't worry. Multiple instances of double strike are redundant. You're not missing much.)
• WWizards of the Coast2020-11-10
  Official Ruling
  The creature needs to be enchanted or equipped at the moment it's declared as an attacker to cause Reyav's ability to trigger. If the creature is no longer enchanted or equipped (or no longer attacking) as the ability tries to resolve, the ability still resolves.

Rulings via Scryfall