Secrets of the Key 
Instant
$0.12 #13866 0.00 5.1 years
Investigate. If this spell was cast from a graveyard, investigate twice instead. (Create a Clue token. It's an artifact with "
, Sacrifice this token: Draw a card.")
Flashback 

Click a line or tag to filter
Cards similar to Secrets of the Key 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.
Plunder the Trollshaws92%
$0.21↑#143320.030.2 years↓
"Draw a card. If this spell was cast from a graveyard, draw two cards instead."
Increasing Devotion82%
$0.25↑#3427↑0.10↑14.7 years↑
"Create five 1/1 white Human creature tokens. If this spell was cast from a graveyard, create ten of those tokens instead."
Increasing Savagery80%
$0.38↑#10466↑0.0614.7 years↑
"Put five +1/+1 counters on target creature. If this spell was cast from a graveyard, put ten +1/+1 counters on that creature instead."
Increasing Confusion76%
$0.93↑#9999↑0.71↑14.7 years↑
"Target player mills X cards. If this spell was cast from a graveyard, that player mills twice that many cards instead."
Increasing Ambition76%
$2.60↑#9507↑0.40↑14.7 years↑
"Search your library for a card and put that card into your hand. If this spell was cast from a graveyard, instead search your library for two cards and put those cards into your hand. Then shuffle."
Twinned Vision76%
$0.26↑#20598↓0.080.0 years↓
"Draw a card. If this spell wasn't cast from your hand, draw two cards instead."
The Final Days74%
$0.20↑#130540.071.4 years↓
"Create two tapped 2/2 black Horror creature tokens. If this spell was cast from a graveyard, instead create X of those tokens, where X is the number of creature cards in your graveyard."
Increasing Vengeance72%
$0.86↑#3083↑0.42↑14.7 years↑
"Copy target instant or sorcery spell you control. If this spell was cast from a graveyard, copy that spell twice instead. You may choose new targets for the copies."