Lurking Green Dragon {3}{G}
Creature — Dragon
Flying
This creature can't attack unless defending player controls a creature with flying.
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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.
Mogg Toady 91%
$0.11#30572
"This creature can't attack unless you control more creatures than defending player."
Goblin Goon 91%
$0.35#20282
"This creature can't attack unless you control more creatures than defending player."
Lovestruck Beast // Heart's Desire 90%
$0.23#12443
"This creature can't attack unless you control a 1/1 creature."
Bloodcrazed Goblin 90%
$0.18#25197
"This creature can't attack unless an opponent has been dealt damage this turn."
Warden of the Chained 89%
$0.10#27889
"This creature can't attack unless you control another creature with power 4 or greater."
Lambholt Pacifist // Lambholt Butcher 89%
$0.21#23485
"This creature can't attack unless you control a creature with power 4 or greater."
Goblin Cohort 89%
$0.24#24308
"This creature can't attack unless you've cast a creature spell this turn."
Mogg Conscripts 89%
#27105
"This creature can't attack unless you've cast a creature spell this turn."
Whimwader 88%
$0.11#31591
"This creature can't attack unless defending player controls a blue permanent."
Orcish Conscripts 88%
#30294
"This creature can't attack unless at least two other creatures attack."
Harbor Serpent 88%
$0.14#20206
"This creature can't attack unless there are five or more Islands on the battlefield."
Silburlind Snapper 88%
$0.04#26997
"This creature can't attack unless you've cast a noncreature spell this turn."
Crown-Hunter Hireling 87%
$0.18#24193
"This creature can't attack unless defending player is the monarch."
Vantress Gargoyle 87%
$0.32#11501
"This creature can't attack unless defending player has seven or more cards in their graveyard."
Bloodthirster 87%
$32.32#2531
"This creature can't attack a player it has already attacked this turn."