Ageless Sentinels 
Creature — Wall
$0.29 #26604 0.40 23.3 years
Defender (This creature can't attack.)
Flying
When this creature blocks, it becomes a Bird Giant, and it loses defender. (It's no longer a Wall. This effect lasts indefinitely.)
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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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