Grave Servitude {1}{B}
Enchantment — Aura
You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step.
Enchant creature
Enchanted creature gets +3/-1 and is black.
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Cards that do something similar 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.
Ward of Lights 100%
$0.25#21777
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."
+2 more matching lines
Spider Climb 100%
$0.12#27032
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."
+1 more matching line
Lightning Reflexes 100%
$0.05#24954
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."
+1 more matching line
Mystic Veil 100%
$0.14#22226
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."
+2 more matching lines
Relic Ward 100%
$0.14#27571
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."
Soar 100%
$0.08#30872
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."
Necromancy 100%
$21.03#993
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."
Parapet 100%
$0.09#25749
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."
Armor of Thorns 100%
#27557
"You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step."
+1 more matching line
Molten Exhale 95%
$0.15#13599
"You may cast this spell as though it had flash if you behold a Dragon as an additional cost to cast it."
Quantum Reduction 94%
$0.25#28298
"You may cast this spell as though it had flash if it's cast using teamwork."
+1 more matching line
Heliod, the Radiant Dawn // Heliod, the Warped Eclipse 93%
$2.56#3209
"You may cast spells as though they had flash."