Geier Reach Bandit // Vildin-Pack Alpha

• WWizards of the Coast2016-04-08
  Official Ruling
  To trigger the Werewolf's back face's transform ability, a single player must have cast two or more spells during the previous turn. If multiple players each cast just one spell during the previous turn, the ability won't trigger.
• WWizards of the Coast2016-04-08
  Official Ruling
  The abilities that transform a Werewolf back and forth look at the entire previous turn, even if the Werewolf with that ability wasn't on the battlefield for some or all of that turn.
• WWizards of the Coast2025-01-24
  Official Ruling
  If you control three Vildin-Pack Alphas and a Werewolf enters the battlefield under your control, you may transform it, transform it again, and transform it a third time.
• WWizards of the Coast2025-01-24
  Official Ruling
  If a creature with haste transforms and no longer has haste on the same turn that it comes under your control, such as if you cast a Geier Reach Bandit when you already control a Vildin-Pack Alpha and choose to transform it, it won’t be able to attack that turn.

Rulings via Scryfall