Screaming Swarm 

Creature — Bird Horror
$0.21 #17606 0.53 4.8 years
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.)
Click a line or tag to filter
Cards similar to Screaming Swarm 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.
Bookwurm92%
$0.12↓#13017↑0.27↓5.4 years
"
: Put this card from your graveyard into your library third from the top."
Champion of Stray Souls80%
$0.28↑#148030.5612.6 years↑
"

: Put this card from your graveyard on top of your library."
Fleet Swallower74%
$1.28↑#4941↑0.70↑8.9 years↑
"Whenever this creature attacks, target player mills half their library, rounded up."
Restless Reef74%
$1.85↑#4035↑0.08↓2.8 years↓
"Whenever this land attacks, target player mills four cards."
Veteran Ice Climber73%
$0.27↑#143880.20↓1.4 years↓
"Whenever this creature attacks, up to one target player mills cards equal to this creature's power."
Mindscour Dragon73%
$0.14↓#22950↓0.00↓11.6 years↑
"Whenever this creature deals combat damage to an opponent, target player mills four cards."