Mighty Servant of Leuk-o

• WOTC Official Reminder Textofficial rules
  Crew — Tap any number of creatures you control with total power N or greater: This Vehicle becomes an artifact creature until end of turn.
• WOTC Official Reminder Textofficial rules
  Ward — Whenever this permanent becomes the target of a spell or ability an opponent controls, counter it unless that player pays [cost].

• WWizards of the Coast2022-06-10
  Official Ruling
  An ability that triggers whenever a Vehicle "becomes crewed" triggers when its crew ability resolves. In this case, it will trigger only if exactly two creatures were tapped to pay the crew cost of the ability that caused it to become crewed for the first time that turn.

Rulings via Scryfall