Jester's Mask 
Artifact
$9.90 #20203 0.57 31.3 years
This artifact enters tapped.
, 
, Sacrifice this artifact: Target opponent puts the cards from their hand on top of their library. Search that player's library for that many cards. That player puts those cards into their hand, then shuffles.Click a line or tag to filter
Cards similar to Jester's Mask 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.
Head Games90%
$3.72↓#14402↑0.98↑23.9 years↓
"Target opponent puts the cards from their hand on top of their library. Search that player's library for that many cards. The player puts those cards into their hand, then shuffles."
Chittering Rats84%
$0.19↓#182490.06↓22.6 years↓
"When this creature enters, target opponent puts a card from their hand on top of their library."
Prying Questions84%
$0.10↓#30175↓0.05↓10.1 years↓
"Target opponent loses 3 life and puts a card from their hand on top of their library."
Stunted Growth83%
$0.70↓#30785↓0.43↓31.3 years
"Target player chooses three cards from their hand and puts them on top of their library in any order."
Chimney Imp79%
$0.06↓#30193↓0.4722.9 years↓
"When this creature dies, target opponent puts a card from their hand on top of their library."
Painful Memories78%
$0.18↓#26979↓0.31↓29.9 years↓
"Look at target opponent's hand and choose a card from it. Put that card on top of that player's library."
Agonizing Memories78%
$0.16↓#27525↓0.20↓29.2 years↓
"Look at target player's hand and choose two cards from it. Put them on top of that player's library in any order."
Perish the Thought78%
$0.08↓#29493↓0.5716.4 years↓
"Target opponent reveals their hand. You choose a card from it. That player shuffles that card into their library."
Sadistic Augermage78%
$0.05↓#30038↓0.25↓20.9 years↓
"When this creature dies, each player puts a card from their hand on top of their library."
Runed Arch78%
$0.45↓#30017↓0.25↓31.3 years
"This artifact enters tapped."
Lost Hours74%
$0.05↓#30635↓0.00↓19.3 years↓
"Target player reveals their hand. You choose a nonland card from it. That player puts that card into their library third from the top."
Elixir74%
$0.21↓#8363↑0.05↓1.2 years↓
"This artifact enters tapped."
Dungeoneer's Pack73%
$0.28↓#10560↑0.07↓4.2 years↓
"This artifact enters tapped."
Jester's Cap71%
$0.31↓#13747↑0.42↓31.3 years
"
, , Sacrifice this artifact: Search target player's library for three cards and exile them. Then that player shuffles."
, , Sacrifice this artifact: Search target player's library for three cards and exile them. Then that player shuffles."
Volrath's Dungeon70%
$0.29↓#25093↓0.39↓28.2 years↓
"Discard a card: Target player puts a card from their hand on top of their library. Activate only as a sorcery."