Falling under the Amethyst ink type, this card has a very high cost of 8 ink to be summoned, however, if a player has an Elsa card already in play, the Spirit of Winter card can be "Shifted" and summoned for only 6 ink
Her ability to put a card from your hand on top of your deck would be almost a detriment if we didn't include shuffling effects in the deck
Its a fog on steroids, basically, and one thats an intriguing option
Black generally doesn't have very many ways to untap creatures, but you can still work around this to get multiple casts in a turn with cards like Thousand-Year Elixer
$10 on Chatterfang, Squirrel General, $6 for Toski, Bearer of Secrets, another $10 for Beledros Witherbloom, $6 for Skullclamp, $6 for Second Harvest, $4 for Maskwood Nexus, and even $13 for Swarmyard
You can pull Leader cards, Super Rares, Secret Rares, DON