It works particularly well in control decks that have plenty of ways to dig through their library, counter spells, and disrupt the opponent through cards like Blood Moon
Almost every Ragavan, Nimble Pilferer deck plays the two-mana sorcery alongside it, as the more mana you can create, the better Iteration is as it is not being forced to take lands from it/having the mana to be able to cast any card you hit makes Iteration closer to a two-mana spell that draws two of the top three cards, which is utterly broken
While this card only has 70 HP, it is still an integral part of the meta and keeps many turbo decks in check
Kiora, Master of the Depths Kiora, Master of the Depths is close to the perfect planeswalker in terms of power: It gives you a genuine advantage, especially if that uptick untaps a land and a mana dork
If the top card of your library is a historic card with a disguise or morph ability, you can't cast it face down from the top of your library with the permission granted by Crystal Skull because the resulting spell would not be a historic spell
The same is true for trample and lifelink
