Rulings

• 2016-04-08
  The token is named Clue and has the artifact subtype Clue. Clue isn’t a creature type.
• 2016-04-08
  The tokens are normal artifacts. For example, they can be sacrificed to cast Angelic Purge or targeted by Root Out.
• 2016-04-08
  If you sacrifice a Clue for another card’s cost or effect, such as that of Angelic Purge or Tamiyo’s Journal, you can’t also pay and sacrifice it to draw a card.
• 2020-08-07
  If a nontoken creature dies at the same time as Ulvenwald Mysteries, the first ability triggers.
• 2020-08-07
  The last ability is a triggered ability, not an activated ability. It doesn't allow you to sacrifice a Clue whenever you want; rather, you need some other way of sacrificing it, such as the activated ability that Clue tokens have.
• 2020-08-07
  If you sacrifice a Clue as part of casting a spell or activating an ability, the last ability will resolve before that spell or ability.