Soul-Strike Technique 

Enchantment — Aura
Enchant creature
Enchanted creature gets +1/+1 and has vigilance.
When enchanted creature dies, manifest the top card of your library. (Put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)
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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.
Sentinel's Eyes 100%
$0.25#6523
"Enchanted creature gets +1/+1 and has vigilance."
+1 more matching line
Radiant Grace // Radiant Restraints 100%
$0.20#12645
"Enchanted creature gets +1/+0 and has vigilance."
+2 more matching lines
Dragon Scales 99%
$0.13#22553
"Enchanted creature gets +1/+2 and has vigilance."
+1 more matching line
Marked by Honor 87%
$0.06#22228
"Enchanted creature gets +2/+2 and has vigilance."
+1 more matching line
Howl of the Hunt 87%
$0.22#15217
"Enchanted creature gets +2/+2 and has vigilance."
+1 more matching line
Knightly Valor 87%
$0.18#14605
"Enchanted creature gets +2/+2 and has vigilance."
+1 more matching line
Infectious Bloodlust 85%
$0.07#29116
"When enchanted creature dies, you may search your library for a card named this card, reveal it, put it into your hand, then shuffle."
+1 more matching line
Favor of the Overbeing 83%
$0.45#8198
"As long as enchanted creature is green, it gets +1/+1 and has vigilance."
Pattern of Rebirth 82%
$5.71#7082
"When enchanted creature dies, that creature's controller may search their library for a creature card, put that card onto the battlefield, then shuffle."
+1 more matching line