Merfolk Observer 
Creature — Merfolk Rogue
$0.16 #30205 0.00 16.5 years
When this creature enters, look at the top card of target player's library.
Click a line or tag to filter
Cards similar to Merfolk Observer 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.
Dewdrop Spy98%
$0.16#242540.18↑18.7 years↑
"When this creature enters, look at the top card of target player's library."
Rootwater Mystic88%
$0.19↑#282740.33↑28.3 years↑
": Look at the top card of target player's library."
: Look at the top card of target player's library."
Case the Joint84%
$0.13↓#18310↑0.004.5 years↓
"Draw two cards, then look at the top card of each player's library."
Orcish Spy80%
$0.14↓#20810↑0.11↑32.0 years↑
"
: Look at the top three cards of target player's library."
: Look at the top three cards of target player's library."
Aven Windreader78%
$0.05↓#293710.0625.1 years↑
": Target player reveals the top card of their library."
: Target player reveals the top card of their library."
Field of Dreams76%
$142.56↑#17672↑0.47↑32.4 years↑
"Players play with the top card of their libraries revealed."
Wizened Snitches76%
$0.30↑#14854↑0.27↑21.0 years↑
"Players play with the top card of their libraries revealed."
Goblin Spy75%
$0.24↑#252600.0026.0 years↑
"Play with the top card of your library revealed."
Visions74%
$0.20↑#278290.0032.4 years↑
"Look at the top five cards of target player's library. You may then have that player shuffle that library."
Architects of Will73%
$0.20↑#20817↑0.0717.5 years
"When this creature enters, look at the top three cards of target player's library, then put them back in any order."
Wu Spy72%
$23.11↑#299010.42↑27.5 years↑
"When this creature enters, look at the top two cards of target player's library. Put one of them into their graveyard."
Draugr Thought-Thief70%
$0.09↓#243810.20↑5.7 years↓
"When this creature enters, look at the top card of target player's library. You may put that card into their graveyard."
Moonring Island70%
$0.46↑#11847↑0.16↑18.5 years↑
", : Look at the top card of target player's library. Activate only if you control two or more blue permanents."
, : Look at the top card of target player's library. Activate only if you control two or more blue permanents."