Thought Sponge {3}{U}
Creature — Sponge
Flash
This creature enters with a number of +1/+1 counters on it equal to the greatest number of cards an opponent has drawn this turn.
When this creature dies, draw cards equal to its power.
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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.
Rhizome Lurcher 95%
$0.24#17558
"This creature enters with a number of +1/+1 counters on it equal to the number of creature cards in your graveyard."
Watchful Blisterzoa 89%
$0.08#22796
"When this creature dies, draw cards equal to the number of oil counters on it."
Bone Devourer 87%
$0.27#10396
"This creature enters with a number of +1/+1 counters on it equal to the number of creatures that died this turn."
Cogwork Grinder 83%
$0.26#31616
"This creature enters with X +1/+1 counters on it, where X is the number of cards you removed from the draft with cards named this card."
Doom Weaver 83%
$2.79#8222
"As long as this card is paired with another creature, each of those creatures has "When this creature dies, draw cards equal to its power.""
Undergrowth Scavenger 82%
$0.21#18861
"This creature enters with a number of +1/+1 counters on it equal to the number of creature cards in all graveyards."
Ambitious Dragonborn 82%
$0.27#12402
"This creature enters with X +1/+1 counters on it, where X is the greatest power among creatures you control and creature cards in your graveyard."
Goldvein Hydra 82%
$2.77#1452
"This creature enters with X +1/+1 counters on it."
+1 more matching line
Lifeblood Hydra 82%
$0.37#3074
"This creature enters with X +1/+1 counters on it."
+1 more matching line
Marketback Walker 82%
$0.73#4166
"This creature enters with X +1/+1 counters on it."
+1 more matching line