Oracle Text

Legendary Creature — Human Werewolf

First strike When Rahilda, Wanted Cutthroat deals combat damage to a player, exile a nonland card from their library at random. During any turn you attacked with a Wolf or Werewolf, you may cast that card and you may spend mana as though it were mana of any color to cast that spell. Daybound (If a player casts no spells during their own turn, it becomes night next turn.)