On a typical Clue token, the type line is just: Artifact Clue. There are a couple of artifact creatures that are also clues, like Red Herring or Parcel Myr, but that's because they are artifacts (besides being creatures)
You can cast it for four mana, and then activate it for one mana and tap it to destroy all Artifacts, Creatures, and Enchantments
Were going to see some awesome choices and these serialized cards will be notably more expensive
It's handy for combo strategies, builds your Storm count, pumps Prowess creatures, puts an Instant into the graveyard to get you towards Delirium or enlarge a Tarmogoyf, and gets you closer to Threshold or pays for Delve costs And sometimes you would rather have cards on top of your deck than in your hand
It is often unexpected and it takes explaining too