Agility 

Enchantment — Aura
$0.21 #24334 0.10 29.9 years
Enchant creature
Enchanted creature gets +1/+1 and has flanking. (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.)
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Cards similar to Agility 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.
Jabari's Banner84%
$0.23↑#271620.20↑29.2 years
"
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: Target creature gains flanking until end of turn."
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"Other creatures you control with flanking have flanking."