So, conceivably, you could have a deck absolutely riddled with Cids
Instant Color tag templates(None) Stunning Reversal The next time you would lose the game this turn, instead draw seven cards and your life total becomes 1
Casting that cop here means you can spend almost all of your life total by trading that total for colorless mana to spend on spells and abilities
Even without cutesy creature types in your deck, this is a fine way to either draw extra creatures or fill the yard, though Id probably want my graveyard to matter before I get really excited to play Bison Whistle
It also helps turn on Dragons Rage Channeler quickly, and technically reduces deck size like Street Wraith and Manamorphose
And if you scry a bunch and built up for an ultimate, putting three artifacts onto the battlefield from your library is game-winning