The fact that linear decks thrive in Historic currently, and many of them are light on interaction, helps contribute to this too
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
We also have the optional bonus for additional mana to give our creatures +1/+0 and first strike while also generating Treasure tokens when they deal combat damage
The same is true in the Witherbloom Witchcraft deck, which uses powerful on-color lifegain cards from across the entire game
But if you stop that one attack with Horn of Deafening or similar effects you'll be good and nothing can get through
Good The first Legendary Action card, The Return of Hercules