Flying
When Wavesifter enters, investigate twice. (To investigate, create a Clue token. It’s an artifact with “, Sacrifice this artifact: Draw a card.”)
Evoke (You may cast this spell for its evoke cost. If you do, it’s sacrificed when it enters.)
The tokens are normal artifacts. For example, one can be sacrificed to activate the ability of Breya's Apprentice and one can be the target of Break Ties.
18-06-2021
wotc
The token is named Clue Token and has the artifact subtype Clue. Clue isn't a creature type.
18-06-2021
wotc
You can't sacrifice a Clue to activate its own ability and also to activate another ability that requires sacrificing a Clue (or any artifact) as a cost, such as that of Lonis, Cryptozoologist.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.