Observed Stasis 

Enchantment — Aura
$0.23 #5262 0.22 1.4 years
Flash
Enchant creature an opponent controls
When this Aura enters, remove enchanted creature from combat. Then draw a card for each tapped creature its controller controls.
Enchanted creature loses all abilities and can't attack or block.
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Cards similar to Observed Stasis 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.
Recumbent Bliss88%
$0.15↓#19500↓0.1718.2 years↑
"Enchanted creature can't attack or block."
+1 more matching line
Choking Restraints86%
$0.15↓#23598↓0.2710.2 years↑
"Enchanted creature can't attack or block."
+1 more matching line
Path to Redemption86%
$0.09↓#9962↓0.180.9 years
"Enchanted creature can't attack or block."
+1 more matching line
Arrest85%
$0.06↓#11580↓0.60↑27.0 years↑
"Enchanted creature can't attack or block, and its activated abilities can't be activated."
Trapped in the Tower85%
$0.12↓#19228↓0.67↑7.0 years↑
"Enchanted creature can't attack or block, and its activated abilities can't be activated."
Lawmage's Binding85%
$0.20↓#16580↓0.247.7 years↑
"Enchanted creature can't attack or block, and its activated abilities can't be activated."
Pillory of the Sleepless84%
$0.14↓#18942↓0.50↑20.7 years↑
"Enchanted creature can't attack or block."
+1 more matching line
Sigarda's Imprisonment84%
$0.18↓#20471↓0.05↓4.9 years↑
"Enchanted creature can't attack or block."
+1 more matching line