Oblivious Bookworm 
Creature — Human Wizard
$0.18 #12705 0.11 1.9 years
At the beginning of your end step, you may draw a card. If you do, discard a card unless a permanent entered the battlefield face down under your control this turn or you turned a permanent face up this turn.
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Cards similar to Oblivious Bookworm 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.
They Came from the Pipes75%
$0.33↑#5534↑0.33↑1.9 years
"Whenever a face-down creature you control enters, draw a card."
Secret Plans74%
$0.20↑#8656↑0.44↑11.9 years↑
"Whenever a permanent you control is turned face up, draw a card."
Kadena, Slinking Sorcerer74%
$0.39↑#120520.41↑7.0 years↑
"Whenever a face-down creature you control enters, draw a card."
Lady of Laughter73%
$0.32↑#19544↓0.53↑3.0 years↑
"At the beginning of your end step, if two or more nonland permanents entered the battlefield under your control this turn, draw a card."
Tunnel Tipster73%
$0.20↑#15499↓0.192.6 years
"At the beginning of your end step, if a face-down creature entered the battlefield under your control this turn, put a +1/+1 counter on this creature."
Rook Turret71%
$0.19↑#8505↑0.111.2 years
"Whenever another artifact you control enters, you may draw a card. If you do, discard a card."
Skyswimmer Koi71%
$0.17↓#17188↓0.36↑4.5 years↑
"Whenever an artifact you control enters, you may draw a card. If you do, discard a card."
Thought Courier71%
$0.18#103350.1022.3 years↑
"
: Draw a card, then discard a card."
: Draw a card, then discard a card."
Merfolk Looter71%
$0.15↓#4376↑0.24↑28.2 years↑
": Draw a card, then discard a card."
: Draw a card, then discard a card."
Facet Reader70%
$0.08↓#23335↓0.00↓6.4 years↑
"
, : Draw a card, then discard a card."
, : Draw a card, then discard a card."
Dragonborn Looter70%
$0.21↑#127480.074.2 years↑
", : Draw a card, then discard a card."
, : Draw a card, then discard a card."
Captain of Umbar70%
$0.15↓#17016↓0.68↑3.2 years↑
", : Draw a card, then discard a card."
, : Draw a card, then discard a card."
Shoal Kraken70%
$0.12↓#22489↓0.00↓6.6 years↑
"Whenever an enchantment you control enters, you may draw a card. If you do, discard a card."
Marauding Looter70%
$0.24↑#21542↓0.00↓8.9 years↑
"At the beginning of your end step, if you attacked this turn, you may draw a card. If you do, discard a card."
Furtive Analyst70%
$0.04↓#27110↓0.24↑3.4 years↑
"
, : Draw a card, then discard a card."
, : Draw a card, then discard a card."
Soothsayer Adept70%
$0.03↓#26356↓0.29↑5.4 years↑
", : Draw a card, then discard a card."
, : Draw a card, then discard a card."
Erratic Visionary70%
$0.04↓#25508↓0.00↓7.3 years↑
", : Draw a card, then discard a card."
, : Draw a card, then discard a card."
Teferi's Protege70%
$0.05↓#24276↓0.59↑6.2 years↑
", : Draw a card, then discard a card."
, : Draw a card, then discard a card."
Research Assistant70%
$0.08↓#30521↓0.29↑12.1 years↑
"
, : Draw a card, then discard a card."
, : Draw a card, then discard a card."
Customs Depot70%
$0.19↑#27314↓0.0526.9 years↑
"Whenever you cast a creature spell, you may pay . If you do, draw a card, then discard a card."
. If you do, draw a card, then discard a card."