Rulings

• 2016-04-08
  The "planeswalker uniqueness rule" looks for planeswalkers that share a planeswalker type. If you control Arlinn Kord and Arlinn, Embraced by the Moon at the same time, you'll choose one to put into its owner's graveyard.
• 2016-04-08
  Arlinn Kord is not a Werewolf card; that is, she doesn't have the creature type Werewolf. Spells and abilities that refer to Werewolf cards or Werewolves don't apply to Arlinn.
• 2016-04-08
  You can activate the first ability of Arlinn Kord without any targets just to add a loyalty counter to her.
• 2016-04-08
  When the ability that transforms Arlinn Kord into Arlinn, Embraced by the Moon (or vice versa) resolves, the number of loyalty counters on her doesn't change.
• 2016-04-08
  You can't activate Arlinn Kord's second ability and, after she transforms, activate a loyalty ability of Arlinn, Embraced by the Moon during that turn (or vice versa).
• 2016-07-13
  For more information on double-faced cards, see the Shadows over Innistrad mechanics article (http://magic.wizards.com/en/articles/archive/feature/shadows-over-innistrad-mechanics).