Decoction Module 
Artifact
Whenever a creature you control enters, you get {E} (an energy counter).
{4}, {T}: Return target creature you control to its owner's hand.
click a line to search just that ability, click more to combine them
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.
Chulane, Teller of Tales 99%
$6.94#2521
"{3}, {T}: Return target creature you control to its owner's hand."
Erratic Portal 82%
#9193
"{1}, {T}: Return target creature to its owner's hand unless its controller pays {1}."