Churning Reservoir 
Artifact
$0.10 #19780 0.11 3.7 years
At the beginning of your upkeep, put an oil counter on another target nontoken artifact or creature you control.
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Cards similar to Churning Reservoir 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.
The Monumental Facade78%
$0.18↑#13626↑0.053.7 years
"
, Remove an oil counter from this land: Put an oil counter on target artifact or creature you control. Activate only as a sorcery."
Momentum74%
$0.22↑#29066↓0.1727.4 years↑
"At the beginning of your upkeep, you may put a growth counter on this Aura."
Thallid72%
$0.17↑#9357↑0.27↑32.0 years↑
"At the beginning of your upkeep, put a spore counter on this creature."
+1 more matching line
Thallid Shell-Dweller71%
$0.14↑#9730↑0.00↓21.2 years↑
"At the beginning of your upkeep, put a spore counter on this creature."
+1 more matching line
Assemble the Legion70%
$0.31↑#2298↑0.28↑13.7 years↑
"At the beginning of your upkeep, put a muster counter on this enchantment. Then create a 1/1 red and white Soldier creature token with haste for each muster counter on this enchantment."
Rakka Mar70%
$0.19↑#184170.1317.7 years↑
"
,
: Create a 3/1 red Elemental creature token with haste."