Swathcutter Giant

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

• WWizards of the Coast2018-10-05
  Official Ruling
  If a creature attacks a planeswalker, that planeswalker’s controller is the defending player.
• WWizards of the Coast2018-10-05
  Official Ruling
  In a Two-Headed Giant game, Swathcutter Giant deals 1 damage to each creature controlled by the player it’s attacking. The other player’s creatures are unaffected.

Rulings via Scryfall