Aven Tactician 

Creature — Bird Soldier
$0.03 #28189 0.00 11.4 years
Flying
When this creature enters, bolster 1. (Choose a creature with the least toughness among creatures you control and put a +1/+1 counter on it.)
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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.
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