Barrier of Bones 
Creature — Skeleton Wall
$0.10 #15296 0.06 8.0 years
Defender
When this creature enters, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)
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Cards similar to Barrier of Bones 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.
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"When this creature enters, surveil 2."
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"When this creature enters, surveil 2."
A.I.M. Synthoids98%
$0.15↑#19059↓0.20↑0.3 years↓
"When this creature enters, surveil 2."
Watcher in the Mist98%
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"When this creature enters, surveil 2."
Wreckage Wickerfolk98%
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"When this creature enters, surveil 2."
Semester Foreseer // Peer Review96%
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"When this creature enters, surveil 1."
Underwater Tunnel // Slimy Aquarium95%
$0.12↑#12032↑0.002.1 years↓
"When you unlock this door, surveil 2."
Ixalli's Diviner94%
$0.18↑#22900↓0.25↑9.1 years↑
"When this creature enters, it explores."
Sunrise Seeker94%
$0.05↓#30215↓0.009.1 years↑
"When this creature enters, it explores."
Seekers' Squire94%
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"When this creature enters, it explores."
Tishana's Wayfinder94%
$0.20↑#21342↓0.009.1 years↑
"When this creature enters, it explores."
Merfolk Branchwalker94%
$0.20↑#169980.009.1 years↑
"When this creature enters, it explores."
Cenote Scout94%
$0.20↑#11816↑0.002.9 years↓
"When this creature enters, it explores."
Emissary of Sunrise94%
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"When this creature enters, it explores."
River Herald Guide94%
$0.09↓#18470↓0.24↑2.9 years↓
"When this creature enters, it explores."
Kinjalli's Dawnrunner94%
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"When this creature enters, it explores."