Innocuous Researcher {3}{G}
Creature — Centaur Detective
Parley — Whenever this creature attacks, each player reveals the top card of their library. For each nonland card revealed this way, you investigate. Then each player draws a card.
At the beginning of your end step, you may untap all lands you control. If you do, you can't cast spells until your next turn.
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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.
Wilderness Reclamation 98%
$2.14#926
"At the beginning of your end step, untap all lands you control."
Storm Fleet Negotiator 94%
$0.23#8920
"Whenever this creature attacks, each player reveals the top card of their library. For each nonland card revealed this way, you create a Map token. Then each player draws a card."
Goblin Guide 93%
$1.25#14644
"Whenever this creature attacks, defending player reveals the top card of their library. If it's a land card, that player puts it into their hand."
Cutthroat Negotiator 91%
$0.37#10068
"Whenever this creature attacks, each player reveals the top card of their library. For each nonland card revealed this way, you create a tapped Treasure token. Then each player draws a card."
Conundrum Sphinx 89%
$0.32#17473
"Whenever this creature attacks, each player chooses a card name. Then each player reveals the top card of their library. If the card a player revealed has the name they chose, that player puts it into their hand. If it doesn't, that player puts it on the bottom of their library."
Tsabo's Web 86%
$32.74#19333
"Each land with an activated ability that isn't a mana ability doesn't untap during its controller's untap step."
Robber of the Rich 85%
$1.52#10249
"Whenever this creature attacks, if defending player has more cards in hand than you, exile the top card of their library. During any turn you attacked with a Rogue, you may cast that card and you may spend mana as though it were mana of any color to cast that spell."
Mezzio Mugger 85%
$0.32#12165
"Whenever this creature attacks, exile the top card of each player's library. You may play those cards this turn, and you may spend mana as though it were mana of any color to cast those spells."
Wickerfolk Thresher 85%
$0.23#10404
"Whenever this creature attacks, if there are four or more card types among cards in your graveyard, look at the top card of your library. If it's a land card, you may put it onto the battlefield. If you don't put the card onto the battlefield, put it into your hand."