Ninja Teen 
Enchantment — Class
$1.68 #7178 0.00 0.5 years
(Gain the next level as a sorcery to add its ability.)
Whenever a creature you control leaves the battlefield, each opponent loses 1 life.
: Level 2Creatures you control get +1/+0 and have menace.
: Level 3Creature cards in your graveyard have sneak 
.
.You may cast creature spells from your graveyard using their sneak abilities.
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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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