Evolving Adaptive 
Creature — Phyrexian Warrior
This creature enters with an oil counter on it.
This creature gets +1/+1 for each oil counter on it.
Whenever another creature you control enters, if that creature has greater power or toughness than this creature, put an oil counter on this creature.
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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.
Bladed Ambassador 100%
$0.13#20779
"This creature enters with an oil counter on it."
+1 more matching line
Trawler Drake 100%
$0.10#16785
"This creature gets +1/+1 for each oil counter on it."
+2 more matching lines
Necrosquito 100%
$0.25#14969
"This creature gets +1/+1 for each oil counter on it."
+2 more matching lines
Exuberant Fuseling 100%
$0.26#13810
"This creature gets +1/+0 for each oil counter on it."
+1 more matching line
Ichorplate Golem 85%
$0.15#19302
"Whenever a creature you control enters, if it has one or more oil counters on it, put an oil counter on it."
Soultether Golem 82%
$0.26#26574
"Whenever another creature you control enters, put a time counter on this creature."