Breakthrough 
Sorcery
$0.18 #9950 0.36 24.6 years
Draw four cards, then choose X cards in your hand and discard the rest.
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Cards similar to Breakthrough 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.
Thoughtflare90%
$0.11↓#19962↓0.65↑13.9 years↓
"Draw four cards, then discard two cards."
Prying Eyes90%
$0.07↓#22970↓0.24↓7.6 years↓
"Draw four cards, then discard two cards."
Pull from Tomorrow86%
$0.20↑#934↑0.16↓9.4 years↓
"Draw X cards, then discard a card."
Careful Study79%
$2.55↑#2720↑0.12↓24.9 years
"Draw two cards, then discard two cards."
Tezzeret's Ambition76%
$0.06↓#23254↓0.00↓9.9 years↓
"Draw three cards. If you control no artifacts, discard a card."
Galvanic Giant // Storm Reading75%
$0.24↑#12211↓0.22↓3.0 years↓
"Draw four cards, then discard two cards."
Sphinx of Lost Truths74%
$0.36↑#20280↓0.68↑16.9 years↓
"When this creature enters, draw three cards. Then if it wasn't kicked, discard three cards."
Goblin Lore74%
$0.71↑#14674↓0.3528.2 years↑
"Draw four cards, then discard three cards at random."
Control of the Court74%
$0.34↑#19045↓0.05↓27.3 years↑
"Draw four cards, then discard three cards at random."
Tidings73%
$0.27↑#16728↓0.00↓27.2 years↑
"Draw four cards."
Bazaar Trademage73%
$0.15↓#23494↓0.297.2 years↓
"When this creature enters, draw two cards, then discard three cards."
Elite Instructor73%
$0.06↓#25870↓0.336.6 years↓
"When this creature enters, draw a card, then discard a card."
Bellowing Crier73%
$0.15↓#88310.05↓2.1 years↓
"When this creature enters, draw a card, then discard a card."
Merfolk Traders73%
$0.13↓#28095↓0.20↓29.2 years↑
"When this creature enters, draw a card, then discard a card."
Vodalian Merchant73%
$0.21↑#29082↓0.00↓25.9 years↑
"When this creature enters, draw a card, then discard a card."
Spellbook Seeker // Careful Study72%
$0.11↓#18082↓0.12↓0.4 years↓
"Draw two cards, then discard two cards."
Brilliant Spectrum72%
$0.03↓#26201↓0.53↑10.9 years↓
"Draw X cards, where X is the number of colors of mana spent to cast this spell. Then discard two cards."
Drastic Revelation72%
$0.13↓#27611↓0.4417.3 years↓
"Discard your hand. Draw seven cards, then discard three cards at random."
Screeching Drake72%
$0.35↑#31029↓0.05↓28.2 years↑
"When this creature enters, draw a card, then discard a card."
Owl Familiar72%
$0.09↓#20663↓0.06↓29.3 years↑
"When this creature enters, draw a card, then discard a card."