Thalakos Seer 

Creature — Thalakos Wizard
Shadow (This creature can block or be blocked by only creatures with shadow.)
When this creature leaves the battlefield, draw a 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.
Thought Gorger 80%
$0.34#23260
"When this creature leaves the battlefield, draw a card for each +1/+1 counter on it."
Bloodtracker 80%
$0.30#6143
"When this creature leaves the battlefield, draw a card for each +1/+1 counter on it."