Vazal, the Compleat

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

• WWizards of the Coast2019-11-12
  Official Ruling
  If Vazal has a crew or equip ability, activating it won’t cause anything to happen.
• WWizards of the Coast2019-11-12
  Official Ruling
  If Vazal gains an activated ability that’s normally linked to a non-activated ability of the card it came from, the ability Vazal has isn’t linked to any ability.
• WWizards of the Coast2019-11-12
  Official Ruling
  If Vazal gains an activated ability that’s normally linked to another activated ability of the card it came from, those two abilities Vazal gains are linked for as long as Vazal remains on the battlefield.
• WWizards of the Coast2019-11-12
  Official Ruling
  Activated abilities contain a colon. They’re generally written “[Cost]: [Effect].” Some keyword abilities (such as equip) are activated abilities and will have colons in their reminder text. Vazal won’t gain triggered abilities (which start with “when,” “whenever,” or “at”).
• WWizards of the Coast2019-11-12
  Official Ruling
  If you’re fortunate enough to have two copies of Vazal in a Limited event, you can still put only one into your deck. The other remains in your sideboard.
• WWizards of the Coast2019-11-12
  Official Ruling
  If an activated ability references the card it’s printed on by name, treat Vazal’s instance of that ability as though it referenced Vazal by name instead.

Rulings via Scryfall