Master of Predicaments 


Creature — Sphinx
Flying
Whenever this creature deals combat damage to a player, choose a card in your hand. That player guesses whether the card's mana value is greater than 4. If the player guessed wrong, you may cast the card without paying its mana cost.
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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.
Doomsday Specter 91%
$0.47#22331
"Whenever this creature deals combat damage to a player, look at that player's hand and choose a card from it. The player discards that card."
+1 more matching line
Merfolk Spy 89%
$0.25#18411
"Whenever this creature deals combat damage to a player, that player reveals a card at random from their hand."
Jeskai Elder 88%
$0.16#18047
"Whenever this creature deals combat damage to a player, you may draw a card. If you do, discard a card."
Wharf Infiltrator 88%
$0.37#6458
"Whenever this creature deals combat damage to a player, you may draw a card. If you do, discard a card."
Daring Saboteur 88%
$0.23#10729
"Whenever this creature deals combat damage to a player, you may draw a card. If you do, discard a card."
Abomination of Gudul 88%
$0.05#27101
"Whenever this creature deals combat damage to a player, you may draw a card. If you do, discard a card."
Broodbirth Viper 87%
$0.57#12828
"Whenever this creature deals combat damage to a player, you may draw a card."
Neurok Commando 87%
$0.05#18562
"Whenever this creature deals combat damage to a player, you may draw a card."
Ohran Viper 87%
$1.24#7575
"Whenever this creature deals combat damage to a player, you may draw a card."
Hystrodon 87%
$1.54#19820
"Whenever this creature deals combat damage to a player, you may draw a card."
Shadowmage Infiltrator 87%
$0.40#5436
"Whenever this creature deals combat damage to a player, you may draw a card."
Ninja of the Deep Hours 87%
$2.04#3480
"Whenever this creature deals combat damage to a player, you may draw a card."
Tempest Hawk 86%
$0.88#11969
"Whenever this creature deals combat damage to a player, you may search your library for a card named this card, reveal it, put it into your hand, then shuffle."
Sturmgeist 85%
$0.33#12989
"Whenever this creature deals combat damage to a player, draw a card."
+1 more matching line
Sea-Dasher Octopus 85%
$1.21#4643
"Whenever this creature deals combat damage to a player, draw a card."
Lambholt Elder // Silverpelt Werewolf 85%
$0.13#18281
"Whenever this creature deals combat damage to a player, draw a card."
Soulknife Spy 85%
$0.16#18207
"Whenever this creature deals combat damage to a player, draw a card."
Jhessian Thief 85%
$0.16#19091
"Whenever this creature deals combat damage to a player, draw a card."