Kiora's Dambreaker 
Creature — Leviathan
$0.10 #17713 0.57 7.3 years
When this creature enters, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
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Cards similar to Kiora's Dambreaker 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.
Bloom Hulk100%
$0.15↑#12781↑0.33↓7.3 years
"When this creature enters, proliferate."
Huatli's Raptor100%
$0.29↑#156360.31↓7.3 years
"When this creature enters, proliferate."
Gitaxian Anatomist95%
$0.17↑#153930.503.6 years↓
"When this creature enters, you may tap it. If you do, proliferate."
Sterling Supplier74%
$0.08↓#22921↓0.27↓2.4 years↓
"When this creature enters, put a +1/+1 counter on another target creature you control."
Sandcrafter Mage71%
$0.02↓#29034↓0.29↓11.4 years↑
"When this creature enters, bolster 1."
Sandsteppe Scavenger71%
$0.05↓#28600↓0.07↓11.4 years↑
"When this creature enters, bolster 2."
Sandsteppe Mastodon70%
$0.13↑#21467↓0.00↓11.6 years↑
"When this creature enters, bolster 5."