Whispering Madness 
Sorcery
$2.57 #3160 0.57 13.6 years
Each player discards their hand, then draws cards equal to the greatest number of cards a player discarded this way.
Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)
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Cards similar to Whispering Madness 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.
Windfall93%
$4.81↑#157↑0.84↑27.9 years↑
"Each player discards their hand, then draws cards equal to the greatest number of cards a player discarded this way."
Reforge the Soul93%
$6.41↑#1693↑0.5914.3 years
"Each player discards their hand, then draws seven cards."
Wheel of Fortune93%
$392.39↑#569↑1.19↑33.1 years↑
"Each player discards their hand, then draws seven cards."
Call of the Nightwing91%
$0.13↓#17169↓0.18↓13.6 years
"Cipher"
Dark Deal90%
$1.73↓#1457↑0.73↑11.6 years↓
"Each player discards all the cards in their hand, then draws that many cards minus one."
Jace's Archivist90%
$8.13↑#1896↑0.5615.1 years↑
", 
: Each player discards their hand, then draws cards equal to the greatest number of cards a player discarded this way."
, : Each player discards their hand, then draws cards equal to the greatest number of cards a player discarded this way."
Shadow Slice90%
$0.04↓#22576↓0.4813.6 years
"Cipher"
Wheel of Fate90%
$2.26↓#36750.5519.9 years↑
"Each player discards their hand, then draws seven cards."
Writ of Return90%
$0.39↓#11408↓0.11↓4.4 years↓
"Cipher"
Mental Vapors88%
$0.06↓#22893↓0.80↑13.6 years
"Cipher"
+1 more matching line
Naktamun Lorespinner // Wheel of Fortune88%
$1.60↓#9245↓1.19↑0.4 years↓
"Each player discards their hand, then draws seven cards."
Paranoid Delusions88%
$0.14↓#16422↓0.5913.6 years
"Cipher"
Hands of Binding87%
$0.19↓#15580↓0.33↓13.6 years
"Cipher"
Midnight Recovery86%
$0.13↓#19071↓0.31↓13.6 years
"Cipher"
Last Thoughts86%
$0.18↓#17191↓0.06↓13.6 years
"Cipher"
Dragon Mage86%
$0.18↓#29260.4923.3 years↑
"Whenever this creature deals combat damage to a player, each player discards their hand, then draws seven cards."
Magus of the Wheel85%
$1.11↓#1142↑0.5210.8 years↓
"
, , Sacrifice this creature: Each player discards their hand, then draws seven cards."
, , Sacrifice this creature: Each player discards their hand, then draws seven cards."
Undercity Plague84%
$0.19↓#20564↓0.72↑13.6 years
"Cipher"
Trait Doctoring84%
$0.34↓#13440↓0.36↓13.3 years
"Cipher"
Voidwalk84%
$0.22↓#13753↓0.20↓13.6 years
"Cipher"