Containment Membrane 
Enchantment — Aura
$0.06 #25480 0.22 10.7 years
Surge (You may cast this spell for its surge cost if you or a teammate has cast another spell this turn.)
(You may cast this spell for its surge cost if you or a teammate has cast another spell this turn.)Enchant creature
Enchanted creature doesn't untap during its controller's untap step.
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Cards similar to Containment Membrane 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.
Mesmerizing Dose96%
$0.24↑#10125↑0.36↑3.7 years↓
"Enchanted creature doesn't untap during its controller's untap step."
+1 more matching line
Plumes of Peace95%
$0.12↑#256070.53↑21.2 years↑
"Enchanted creature doesn't untap during its controller's untap step."
Bubble Snare94%
$0.16↑#210040.00↓6.1 years↓
"Enchanted creature doesn't untap during its controller's untap step."
Sinking Feeling94%
$0.20↑#279330.2918.5 years↑
"Enchanted creature doesn't untap during its controller's untap step."
Melancholy93%
$0.07↑#31250↓0.00↓19.7 years↑
"Enchanted creature doesn't untap during its controller's untap step."
Stay Hidden, Stay Silent92%
$0.14↑#17929↑0.182.1 years↓
"Enchanted creature doesn't untap during its controller's untap step."
Jwar Isle Avenger92%
$0.03↓#257450.07↓10.7 years
"Surge You may cast this spell for its surge cost if you or a teammate has cast another spell this turn."
You may cast this spell for its surge cost if you or a teammate has cast another spell this turn."
Goblin Freerunner92%
$0.06#231780.05↓10.7 years
"Surge 
You may cast this spell for its surge cost if you or a teammate has cast another spell this turn."
You may cast this spell for its surge cost if you or a teammate has cast another spell this turn."
So Shiny92%
$0.16↑#262790.06↓5.3 years↓
"Enchanted creature doesn't untap during its controller's untap step."
+1 more matching line
Bitter Chill92%
$0.21↑#13341↑0.243.1 years↓
"Enchanted creature doesn't untap during its controller's untap step."
Unquenchable Thirst91%
$0.08↑#299860.40↑9.3 years↓
"Enchanted creature doesn't untap during its controller's untap step."
+1 more matching line
Watery Grasp90%
$0.11↑#9478↑0.36↑0.9 years↓
"Enchanted creature doesn't untap during its controller's untap step."
+1 more matching line
Boulder Salvo88%
$0.09↑#268270.05↓10.7 years
"Surge You may cast this spell for its surge cost if you or a teammate has cast another spell this turn."
You may cast this spell for its surge cost if you or a teammate has cast another spell this turn."
Reckless Bushwhacker88%
$0.17↑#16071↑0.00↓10.7 years
"Surge You may cast this spell for its surge cost if you or a teammate has cast another spell this turn."
You may cast this spell for its surge cost if you or a teammate has cast another spell this turn."
Bonds of Quicksilver88%
$0.04↓#276160.2516.1 years↑
"Enchanted creature doesn't untap during its controller's untap step."
Dehydration88%
$0.04↓#290070.47↑27.0 years↑
"Enchanted creature doesn't untap during its controller's untap step."
Paralyzing Grasp88%
$0.06#254940.56↑17.0 years↑
"Enchanted creature doesn't untap during its controller's untap step."
Comparative Analysis88%
$0.06#214780.00↓10.7 years
"Surge You may cast this spell for its surge cost if you or a teammate has cast another spell this turn."
You may cast this spell for its surge cost if you or a teammate has cast another spell this turn."
Tyrant of Valakut88%
$0.15↑#255630.00↓10.7 years
"Surge 
You may cast this spell for its surge cost if you or a teammate has cast another spell this turn."
You may cast this spell for its surge cost if you or a teammate has cast another spell this turn."
Fall from Favor88%
$0.17↑#14840↑0.285.9 years↓
"Enchanted creature doesn't untap during its controller's untap step unless that player is the monarch."
+1 more matching line