Sinister Strength 

Enchantment — Aura
$0.16 #27038 0.06 25.7 years
Enchant creature
Enchanted creature gets +3/+1 and is black.
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Cards similar to Sinister Strength 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.
Ghoulflesh82%
$0.06↓#290170.0714.5 years↓
"Enchanted creature gets -1/-1 and is a black Zombie in addition to its other colors and types."
Touch of Darkness82%
$10.28↑#18081↑0.0032.4 years↑
"One or more target creatures become black until end of turn."
Sisay's Ingenuity80%
$0.16#237280.17↑25.7 years
"Enchanted creature has "
: Target creature becomes the color of your choice until end of turn.""
Eaten by Piranhas78%
$0.28↑#3952↑0.34↑2.9 years↓
"Enchanted creature loses all abilities and is a black Skeleton creature with base power and toughness 1/1."
Dream Coat78%
$2.79↑#274710.1232.4 years↑
"
: Enchanted creature becomes the color or colors of your choice. Activate only once each turn."
Ichthyomorphosis76%
$0.15↓#14430↑0.37↑6.7 years↓
"Enchanted creature loses all abilities and is a blue Fish with base power and toughness 0/1."
+1 more matching line
Frogify76%
$0.22↑#4732↑0.60↑7.0 years↓
"Enchanted creature loses all abilities and is a blue Frog creature with base power and toughness 1/1."
+1 more matching line
Living Terrain76%
$0.21↑#268310.0026.4 years
"Enchanted land is a 5/6 green Treefolk creature that's still a land."
Shade's Breath74%
$0.17↑#308620.0624.0 years↓
"Until end of turn, each creature you control becomes a black Shade and gains "
: This creature gets +1/+1 until end of turn.""
Traitor's Clutch72%
$0.12↓#255290.29↑20.0 years↓
"Target creature gets +1/+0, becomes black, and gains shadow until end of turn."
Noggle the Mind71%
$0.18↑#10850↑0.46↑0.7 years↓
"Enchanted creature loses all abilities and is a colorless Noggle with base power and toughness 1/1."
+1 more matching line
Kenrith's Transformation70%
$0.34↑#751↑0.71↑7.0 years↓
"Enchanted creature loses all abilities and is a green Elk creature with base power and toughness 3/3."
+1 more matching line