Screaming Swarm 

Creature — Bird Horror
Flying
Whenever you attack with one or more creatures, target player mills that many cards. (To mill a card, a player puts the top card of their library into their graveyard.)
{2}{U}: Put this card from your graveyard into your library second from the top.
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Cards that do something similar expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Borborygmos and Fblthp 90%
$0.36#17728
"{1}{U}: Put this card into its owner's library third from the top."
Aven Fateshaper 81%
$0.12#24502
"{4}{U}: Look at the top four cards of your library, then put them back in any order."